question: public void add ( int index , Entity entity ) { if ( entities . contains ( entity ) ) { throw new IllegalStateException ( "ToMany relation already contains '" + entity + "'" ) ; } if ( entity . getEntityType ( ) != entityType ) { throw new IllegalStateException ( "Cannot add " + entity . getEntityType ( ) + " to " + getParent ( ) + "." + getName ( ) ) ; } if ( entity . isClearlyNotInDatabase ( ) ) { newEntities . add ( entity ) ; } entities . add ( index , entity ) ; }
target:  We are adding an entity to this list.