/**
 * A boolean internal option.
 */
public class InternalFlag implements InternalOption<Boolean> {
    private final String systemPropertyName;
    private final boolean defaultValue;

    public InternalFlag(String systemPropertyName) {
        this(systemPropertyName, false);
    }

    public InternalFlag(String systemPropertyName, boolean defaultValue) {

        expect:
        def value1 = options.getOption(new InternalFlag("prop1", false))
        value1.get()
        value1.explicit

        def value2 = options.getOption(new InternalFlag("prop2", false))
        value2.get()
        value2.explicit

        def value3 = options.getOption(new InternalFlag("prop3", true))
        !value3.get()
        value3.explicit

import org.gradle.initialization.StartParameterBuildOptions.ConfigurationCacheProblemsOption
import org.gradle.initialization.layout.BuildLayout
import org.gradle.internal.Factory
import org.gradle.internal.buildoption.InternalFlag
import org.gradle.internal.buildoption.InternalOptions
import org.gradle.internal.buildoption.StringInternalOption
import org.gradle.internal.buildtree.BuildModelParameters

        broadcaster.flagRead(flag);
        if (flag.getSystemPropertyName() != null) {
            // Can explicitly disable property using system property
            Option.Value<Boolean> option = options.getOption(new InternalFlag(flag.getSystemPropertyName()));
            if (option.isExplicit() || option.get()) {
                return option.get();
            }
        }
        return enabled.contains(flag);
    }

    @Override