then:
        failureDescriptionStartsWith("Some problems were found with the configuration of task ':customTask' (type 'CustomTask').")
        failureDescriptionContains(implementationUnknown {
            implementationOfTask(':customTask')
            unknownClassloader('CustomTask_Decorated')
        })
        failureDescriptionContains(implementationUnknown {
            additionalTaskAction(':customTask')

${validationMessage("implementation_unknown")}"""
    }

    def "tests output of unknown implementation with unknown classloader"() {
        when:
        render implementationUnknown(true) {
            implementationOfTask(':myTask')
            unknownClassloader('Unknown')
            includeLink()
        }

        then:
        outputEquals """

        then:
        failureDescriptionStartsWith("Some problems were found with the configuration of task ':customTask' (type 'CustomTask').")
        failureDescriptionContains(implementationUnknown {
            implementationOfTask(':customTask')
            unknownClassloader('CustomTask_Decorated')
        })
        failureDescriptionContains(implementationUnknown {
            additionalTaskAction(':customTask')

        }

        UnknownImplementation nestedProperty(String propertyName) {
            prefix = "Property '${propertyName}'"
            this
        }

        UnknownImplementation implementationOfTask(String taskPath) {
            prefix = "Implementation of task '${taskPath}'"
            this
        }

        UnknownImplementation additionalTaskAction(String taskPath) {