outputFile = target.layout.buildDirectory.file('out')
                    }
                    flowScope.always(PrintAction) {
                        parameters.text = producer.flatMap { it.outputFile }.map { it.asFile.text }
                    }
                }
            }

            abstract class Producer extends DefaultTask {

        return Stream.of(
            paramVariablesStack.stream(),
            maybeZeroForKotlinDefault,
            maybeCallerClassName
        ).flatMap(Function.identity()).collect(CodeBlock.joining(", "));
    }

    private void emitInvocationCodeWithReturn(CallInterceptionRequest request, CodeBlock argsCode) {

                inFile = file("in.txt")
                outFile = layout.buildDirectory.file("out.txt")
            }
            task transformer(type: InputTask) {
                inValue = producer.flatMap { t -> t.outFile.map { f -> f.asFile.text as Integer } }.map { i -> i + 2 }
                outFile = file("out.txt")
            }
        """
        def input = file("in.txt")
        def output = file("out.txt")