question: @ Override protected void fireInsertUpdate ( DocumentEvent evt ) { if ( tokenMarker != null ) { DocumentEvent . ElementChange ch = evt . getChange ( getDefaultRootElement ( ) ) ; if ( ch != null ) { tokenMarker . insertLines ( ch . getIndex ( ) + 1 , ch . getChildrenAdded ( ) . length - ch . getChildrenRemoved ( ) . length ) ; } } super . fireInsertUpdate ( evt ) ; }
target:  We overwrite this method to update the token marker state immediately so that any event listeners get a consistent token marker.