</project>
'''

        //when
        runTask 'idea', '''
apply plugin: "java"
apply plugin: "idea"

def hooks = []

idea {
    project {
        ipr {
            beforeMerged {
                assert it.wildcards.contains('!?*.fooBar')
                it.wildcards << '!?*.fooBarTwo'
                hooks << 'before'
            }
            whenMerged {

        super(null);
        this.delegate = delegate;
    }

    @Override
    public void setName(String name) {
        throw new InvalidUserDataException("Configuring eclipse project name in 'beforeMerged' or 'whenMerged' hook is not allowed.");
    }

    @Override
    public String getDefaultResourceName() {
        return delegate.getDefaultResourceName();
    }

    @Override

 *
 * For tackling edge cases, users can perform advanced configuration on the resulting XML file.
 * It is also possible to affect the way the IDEA plugin merges the existing configuration
 * via beforeMerged and whenMerged closures.
 * <p>
 * beforeMerged and whenMerged closures receive a {@link Module} parameter
 * <p>
 * Examples of advanced configuration:
 *
 * <pre class='autoTested'>
 * plugins {
 *     id 'java'

apply plugin: 'java'
apply plugin: 'eclipse'

def hooks = []

dependencies {
  implementation files('newDependency.jar')
}

eclipse {
  classpath {
    file {
      beforeMerged {
        hooks << 'beforeMerged'
        assert it.entries.size() == 4
        assert it.entries.any { it.path.contains('someDependency.jar') }
        assert it.entries.any { it.path.contains('someVarDependency.jar') }

        setup:
        project.eclipse.project {
            natures = ['nature.a']
            linkedResource name: 'linkToDelete1', type: '2', locationUri: '../some-directory'
            file.beforeMerged {
                it.natures += 'nature.b'
                it.buildCommands = [new BuildCommand('buildCommandBefore', [:])]
                it.linkedResources += new Link('linkToDelete2', '2', null, '../some-directory')

        runTask(['idea'], '''
apply plugin: "java"
apply plugin: "idea"

idea {
    module {
        excludeDirs = [project.file('folderThatIsExcludedNow')] as Set
        iml {
            beforeMerged { it.excludeFolders.clear() }
            whenMerged   { it.jdkName = '1.33'   }
        }
    }
}
''')
        //then
        def iml = getFile([:], 'root.iml').text

Method <org.gradle.plugins.ide.api.FileContentMerger.beforeMerged(groovy.lang.Closure)> has arguments/return type groovy.lang.Closure that is not Gradle public API or primitive or built-in JDK classes or Kotlin classes in (FileContentMerger.java:0)