import org.gradle.api.specs.Spec;
import org.gradle.api.specs.Specs;
import org.gradle.internal.exceptions.DiagnosticsVisitor;

public class ClosureToSpecNotationConverter<T> implements NotationConverter<Closure, Spec<T>> {
    private final Class<T> type;

    public ClosureToSpecNotationConverter(Class<T> type) {
        this.type = type;
    }

    @Override

package org.gradle.internal.typeconversion

import org.gradle.api.specs.Spec
import spock.lang.Specification

class ClosureToSpecNotationConverterTest extends Specification {
    private ClosureToSpecNotationConverter converter = new ClosureToSpecNotationConverter(String)

    def "converts closures"() {
        given:
        def spec = parse({ it == 'foo' })

        expect:
        spec.isSatisfiedBy("foo")

                .invalidNotationMessage("Please check the input for the DependencyInsight.dependency element.")
                .fromType(Closure.class, new ClosureToSpecNotationConverter<>(DependencyResult.class))
                .fromCharSequence(new DependencyResultSpecNotationConverter())
                .toComposite();
    }

Class <org.gradle.internal.typeconversion.ClosureToSpecNotationConverter> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (ClosureToSpecNotationConverter.java:0)