drools-eclipse/org.drools.eclipse/src/main/java/org/drools/eclipse/editors/DRLRuleEditorActionContributor.java
public void setActivePage(IEditorPart activeEditor) {
        IActionBars bars = getActionBars();
        if ( activeEditor instanceof ITextEditor ) {
            if ( bars != null ) {
                contributor.setActiveEditor( activeEditor );
            }
        }
    }
public void setActivePage(IEditorPart activeEditor) {
        IActionBars bars = getActionBars();
        if ( activeEditor instanceof ITextEditor ) {
            if ( bars != null ) {
                contributor.setActiveEditor( activeEditor );
            }
        }
    }
/* (non-Javadoc)
@see org.eclipse.ui.part.MultiPageEditorActionBarContributor#setActivePage(org.eclipse.ui.IEditorPart)