// -----------------------------------------------------
    //                                          Mail Address
    //                                          ------------
    public void setFrom(String from, String personal) {
        doSetFrom(from, personal);
    }

    public void addTo(String to) {
        doAddTo(to);
    }

    public void addTo(String to, String personal) {

        });
        workQueue.submit(CheckstyleAction.class, this::setupParameters);
    }

    private void setupParameters(CheckstyleActionParameters parameters) {
        parameters.getAntLibraryClasspath().setFrom(getCheckstyleClasspath());
        parameters.getConfig().set(getConfigFile());
        parameters.getMaxErrors().set(getMaxErrors());
        parameters.getMaxWarnings().set(getMaxWarnings());

 * There should not be setters for lazy properties like link:{javadocPath}/org/gradle/api/file/ConfigurableFileCollection.html[`ConfigurableFileCollection`].  Use `setFrom` instead. For example,
----
    validateTaskProperties.getClasses().setFrom(fileCollection)
    validateTaskProperties.getClasspath().setFrom(fileCollection)
----

=== Potential breaking changes

The following changes were not previously deprecated:

        return bootstrapClasspath;
    }

    public void setBootstrapClasspath(FileCollection classpath) {
        internalGetBootstrapClasspath().setFrom(classpath);
    }

    public void setBootstrapClasspath(Object... classpath) {
        internalGetBootstrapClasspath().setFrom(classpath);
    }

    public void bootstrapClasspath(Object... classpath) {
        internalGetBootstrapClasspath().from(classpath);
    }

        return classpath;
    }

    @Override
    public JavaExecSpec setClasspath(FileCollection classpath) {
        this.classpath = fileCollectionFactory.configurableFiles("classpath");
        this.classpath.setFrom(classpath);
        return this;
    }

    @Override
    public boolean isIgnoreExitValue() {
        return ignoreExitValue;
    }

    @Override

        library.publicHeaders.from(d1)
        library.privateHeaders.from(d2)
        binary.compileIncludePath.files as List == [d1, d2]

        library.publicHeaders.setFrom(d3)
        library.privateHeaders.from(d4)
        binary.compileIncludePath.files as List == [d3, d2, d4]
    }

    def "can query the header files of the library"() {
        def d1 = tmpDir.createDir("d1")

            task.getOutputFile().set(project.getLayout().getBuildDirectory().file("reports/plugin-development/validation-report.json"));

            task.getClasses().setFrom((Callable<Object>) () -> extension.getPluginSourceSet().getOutput().getClassesDirs());
            task.getClasspath().setFrom((Callable<Object>) () -> extension.getPluginSourceSet().getCompileClasspath());

            task.getLauncher().convention(toolchainLauncher(project));
        });

            case DIRECTORY_PROPERTY:
                assignment = ".fileValue(arg0)";
                break;
            case CONFIGURABLE_FILE_COLLECTION:
                assignment = ".setFrom(arg0)";
                break;
            case LIST_PROPERTY:
            case SET_PROPERTY:
            case MAP_PROPERTY:
            case PROPERTY:
                assignment = ".set(arg0)";

     */
    @PathSensitive(PathSensitivity.RELATIVE)
    @InputFiles
    public FileCollection getLibs() {
        return libs;
    }

    public void setLibs(FileCollection libs) {
        this.libs.setFrom(libs);
    }

    /**
     * Adds a set of library files to be installed. The provided libs object is evaluated as per {@link org.gradle.api.Project#files(Object...)}.
     */
    public void lib(Object libs) {

                    return sourceFiles;
                }

                public void setSourceFiles(Object files) {
                    System.out.println("set files using field");
                    sourceFiles.setFrom(files);
                }
            }
        """
        file("buildSrc/src/main/java/CustomTask.java") << """
            import org.gradle.api.GradleException;