Bug 68011 [java search] "Search the JRE System Libraries" looks like a local preference but behaves as a global one... [search]
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/FindAction.java
import org.eclipse.jdt.core.ILocalVariable;
import org.eclipse.jdt.core.IMember;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.core.search.SearchEngine;
import org.eclipse.jdt.internal.corext.util.JavaModelUtil;
import org.eclipse.jdt.ui.JavaElementLabelProvider;
import org.eclipse.jdt.ui.search.ElementQuerySpecification;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.actions.ActionUtil;
import org.eclipse.jdt.internal.ui.actions.SelectionConverter;
import org.eclipse.jdt.internal.ui.dialogs.ProblemDialog;
import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
import org.eclipse.jdt.internal.ui.search.JavaSearchDescription;
import org.eclipse.jdt.internal.ui.search.JavaSearchQuery;
import org.eclipse.jdt.internal.ui.search.SearchMessages;
import org.eclipse.jdt.internal.ui.search.SearchUtil;
import org.eclipse.jdt.internal.ui.util.ExceptionHandler;
/**
 * Abstract class for Java search actions.
 * <p>
 * Note: This class is for internal use only. Clients should not use this class.
 * </p>
 * 
 * @since 2.0
 */
public abstract class FindAction extends SelectionDispatchAction {