parseUnit(f)
  skipErrorTokens(f)
  listener: beginCompilationUnit(f)
  syntheticPreviousToken(f)
  parseTopLevelDeclarationImpl(, DirectiveContext(DirectiveState.Unknown))
    parseMetadataStar()
      listener: beginMetadataStar(f)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl()
      listener: beginTopLevelMember(f)
      isReservedKeyword(()
      parseTopLevelMethod(, null, null, , NoType(), null, f, false)
        listener: beginTopLevelMethod(, null, null)
        listener: handleNoType()
        ensureIdentifierPotentiallyRecovered(, topLevelFunctionDeclaration, false)
          listener: handleIdentifier(f, topLevelFunctionDeclaration)
        parseMethodTypeVar(f)
          listener: handleNoTypeVariables(()
        parseGetterOrFormalParameters(f, f, false, MemberKind.TopLevelMethod)
          parseFormalParameters(f, MemberKind.TopLevelMethod)
            parseFormalParametersRest((, MemberKind.TopLevelMethod)
              listener: beginFormalParameters((, MemberKind.TopLevelMethod)
              parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
                parseMetadataStar(()
                  listener: beginMetadataStar(x)
                  listener: endMetadataStar(0)
                listener: beginFormalParameter(x, MemberKind.TopLevelMethod, null, null, null)
                listener: handleNoType(()
                ensureIdentifier((, formalParameterDeclaration)
                  listener: handleIdentifier(x, formalParameterDeclaration)
                listener: handleFormalParameterWithoutValue(,)
                listener: endFormalParameter(null, null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
              parseFormalParameter(,, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
                parseMetadataStar(,)
                  listener: beginMetadataStar(y)
                  listener: endMetadataStar(0)
                listener: beginFormalParameter(y, MemberKind.TopLevelMethod, null, null, null)
                listener: handleNoType(,)
                ensureIdentifier(,, formalParameterDeclaration)
                  listener: handleIdentifier(y, formalParameterDeclaration)
                listener: handleFormalParameterWithoutValue())
                listener: endFormalParameter(null, null, null, null, y, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
              listener: endFormalParameters(2, (, ), MemberKind.TopLevelMethod)
        parseAsyncModifierOpt())
          listener: handleAsyncModifier(null, null)
          inPlainSync()
        parseFunctionBody(), false, false)
          listener: beginBlockFunctionBody({)
          notEofOrType(CLOSE_CURLY_BRACKET, switch)
          parseStatement({)
            parseStatementX({)
              parseSwitchStatement({)
                listener: beginSwitchStatement(switch)
                ensureParenthesizedCondition(switch, allowCase: false)
                  parseExpressionInParenthesisRest((, allowCase: false)
                    parseExpression(()
                      looksLikeOuterPatternEquals(()
                        skipOuterPattern(()
                          skipObjectPatternRest(x)
                      parsePrecedenceExpression((, 1, true, ConstantPatternContext.none)
                        parseUnaryExpression((, true, ConstantPatternContext.none)
                          parsePrimary((, expression, ConstantPatternContext.none)
                            parseSendOrFunctionLiteral((, expression, ConstantPatternContext.none)
                              parseSend((, expression, ConstantPatternContext.none)
                                ensureIdentifier((, expression)
                                  listener: handleIdentifier(x, expression)
                                listener: handleNoTypeArguments())
                                parseArgumentsOpt(x)
                                  listener: handleNoArguments())
                                listener: handleSend(x, x)
                    ensureCloseParen(x, ()
                    listener: handleParenthesizedCondition((, null, null)
                parseSwitchBlock())
                  ensureBlock(), BlockKind(switch statement))
                  listener: beginSwitchBlock({)
                  notEofOrType(CLOSE_CURLY_BRACKET, case)
                  peekPastLabels(case)
                  listener: beginCaseExpression(case)
                  parsePattern(case, PatternContext.matching, precedence: 1)
                    listener: beginPattern(case)
                    parsePrimaryPattern(case, PatternContext.matching)
                      parseVariablePattern(case, PatternContext.matching, typeInfo: NoType())
                        listener: handleNoType(_)
                        listener: handleWildcardPattern(null, _)
                    listener: endPattern(_)
                  listener: beginSwitchCaseWhenClause(when)
                  parseExpression(when)
                    looksLikeOuterPatternEquals(when)
                      skipOuterPattern(when)
                        skipObjectPatternRest(y)
                    parsePrecedenceExpression(when, 1, true, ConstantPatternContext.none)
                      parseUnaryExpression(when, true, ConstantPatternContext.none)
                        parsePrimary(when, expression, ConstantPatternContext.none)
                          parseSendOrFunctionLiteral(when, expression, ConstantPatternContext.none)
                            parseSend(when, expression, ConstantPatternContext.none)
                              ensureIdentifier(when, expression)
                                listener: handleIdentifier(y, expression)
                              listener: handleNoTypeArguments(+)
                              parseArgumentsOpt(y)
                                listener: handleNoArguments(+)
                              listener: handleSend(y, y)
                      listener: beginBinaryExpression(+)
                      parsePrecedenceExpression(+, 14, true, ConstantPatternContext.none)
                        parseUnaryExpression(+, true, ConstantPatternContext.none)
                          parsePrimary(+, expression, ConstantPatternContext.none)
                            parseParenthesizedExpressionFunctionLiteralOrRecordLiteral(+, ConstantPatternContext.none)
                              listener: handleNoTypeVariables(()
                              parseFunctionExpression(+)
                                listener: beginFunctionExpression(()
                                parseFormalParametersRequiredOpt(+, MemberKind.Local)
                                  parseFormalParametersRest((, MemberKind.Local)
                                    listener: beginFormalParameters((, MemberKind.Local)
                                    listener: endFormalParameters(0, (, ), MemberKind.Local)
                                parseAsyncOptBody(), true, false)
                                  parseAsyncModifierOpt())
                                    listener: handleAsyncModifier(null, null)
                                    inPlainSync()
                                  parseFunctionBody(), true, false)
                                    parseExpressionFunctionBody(=>, true)
                                      parseExpression(=>)
                                        looksLikeOuterPatternEquals(=>)
                                          skipOuterPattern(=>)
                                        parsePrecedenceExpression(=>, 1, true, ConstantPatternContext.none)
                                          parseUnaryExpression(=>, true, ConstantPatternContext.none)
                                            parsePrimary(=>, expression, ConstantPatternContext.none)
                                              parseLiteralInt(=>)
                                                listener: handleLiteralInt(0)
                                      listener: handleExpressionFunctionBody(=>, null)
                                      inGenerator()
                                listener: endFunctionExpression((, 0)
                      listener: endBinaryExpression(+, 0)
                  listener: endSwitchCaseWhenClause(0)
                  ensureColon(0)
                  listener: endCaseExpression(case, when, :)
                  peekPastLabels(break)
                  parseStatementsInSwitchCase(:, break, case, 0, 1, null, null)
                    listener: beginSwitchCase(0, 1, case)
                    parseStatement(:)
                      parseStatementX(:)
                        parseBreakStatement(:)
                          isBreakAllowed()
                          ensureSemicolon(break)
                          listener: handleBreakStatement(false, break, ;)
                    peekPastLabels(})
                    listener: endSwitchCase(0, 1, null, null, 1, case, ;)
                  notEofOrType(CLOSE_CURLY_BRACKET, })
                  listener: endSwitchBlock(1, {, })
                listener: endSwitchStatement(switch, })
          notEofOrType(CLOSE_CURLY_BRACKET, })
          listener: endBlockFunctionBody(1, {, })
        listener: endTopLevelMethod(f, null, })
  listener: endTopLevelDeclaration(})
  reportAllErrorTokens(f)
  listener: endCompilationUnit(1, )