Bug 81196 Can't search for References, ... to an ITypeParameter [search]
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/FindImplementorsInProjectAction.java
* Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.ui.actions;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.ui.PlatformUI;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.ui.search.ElementQuerySpecification;
import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
import org.eclipse.jdt.internal.ui.search.JavaSearchQuery;
import org.eclipse.jdt.internal.ui.search.JavaSearchScopeFactory;
import org.eclipse.jdt.internal.ui.search.SearchMessages;
/**
 * Finds implementors of the selected element in the enclosing project.
 * The action is applicable to selections representing a Java interface.
 * 
 * <p>
 * This class may be instantiated; it is not intended to be subclassed.
 * </p>
 * 
 * @since 3.0
 */
public class FindImplementorsInProjectAction extends FindImplementorsAction {
	/**
	 * Creates a new <code>FindImplementorsInProjectAction</code>. The action 
	 * requires that the selection provided by the site's selection provider is of type 
	 * <code>IStructuredSelection</code>.
	 *