/**
         * Returns the display name of this transformer.
         */
        String getDisplayName();

    }

    /**
     * Describes the subject (artifact or file) of a transform operation.
     *
     * @since 5.1
     */
    interface SubjectDescriptor {

        /**
         * Returns the display name of this subject.
         */
        String getDisplayName();

        when:
        property.attachOwner(owner(), displayName("<display-name>"))
        property.get()

        then:
        def t2 = thrown(MissingValueException)
        t2.message == "Cannot query the value of <display-name> because it has no value available."

        when:
        property.set(someValue())
        property.get()

        then:

        settings                     | buildName | dependencyName | display
        ""                           | "buildB"  | "buildB"       | "default root project name"
        "rootProject.name='someLib'" | "buildB"  | "someLib"      | "configured root project name"
    }

    @ToBeFixedForConfigurationCache
    def "includes build identifier in task failure error message with #display"() {
        repo.file("settings.gradle") << """

                        println "display-name: " + sources.displayName
                        println "to-string: " + sources.toString()
                    }
                }
            }
        }
        apply plugin: Rules
        """

        expect:
        succeeds "printTask"
        output.contains("name: fss")
        output.contains("display-name: FunctionalSourceSet 'fss'")

    @Test
    void defaultValues() {
        expect:
        assertThat(sourceSet.scala, instanceOf(DefaultSourceDirectorySet))
        assertThat(sourceSet.scala, isEmpty())
        assertThat(sourceSet.scala.displayName, equalTo('<set-display-name> Scala source'))

     * a human each child operation of a given operation.
     */
    String getName();

    /**
     * Returns a human consumable display name for the operation. This display name should generally provide enough context
     * to uniquely identify the operation to a human.
     *
     * @return The display name of the operation
     */
    String getDisplayName();

    /**
     * Returns the id of the parent of the operation, if any.

     *
     * The executor will collect failures thrown by actions and rethrow when the executor is stopped.
     *
     * @param displayName The display name for the this executor. Used for thread names, logging and error message.
     * @return The executor.
     */
    ManagedExecutor create(String displayName);

    /**

    def collection = new DefaultConfigurableFileCollection("<display>", fileResolver, taskDependencyFactory, patternSetFactory, host)

    @Override
    AbstractFileCollection containing(File... files) {
        def resolver = Stub(FileResolver)
        _ * resolver.resolve(_) >> { File f -> f }
            return new DefaultConfigurableFileCollection("<display>", resolver, taskDependencyFactory, patternSetFactory, host).from(files)
    }

     * Returns the location of this resource.
     */
    ResourceLocation getLocation();

    /**
     * A long display name for this resource. The display name must use absolute paths and assume no context.
     */
    DisplayName getLongDisplayName();

    /**
     * A short display name for this resource. The display name may use relative paths.
     */
    DisplayName getShortDisplayName();

    /**

tools used by the application ear file consumer will display the description when processing the parent element that contains the description. Used in: application, security-role --> <!ELEMENT description (#PCDATA)> <!-- The display-name element contains a short name that is intended to be displayed by tools. The display name need not be unique. Used in: application Example: <display-name>Employee Self Service</display-name> --> <!ELEMENT display-name (#PCDATA)> <!-- The ejb element specifies the URI...