question: public static int checkField ( int luaState , Object obj , String fieldName ) throws LuaException { LuaState L = LuaStateFactory . getExistingState ( luaState ) ; synchronized ( L ) { Field field = null ; Class objClass ; if ( obj instanceof Class ) { objClass = ( Class ) obj ; } else { objClass = obj . getClass ( ) ; } try { field = objClass . getField ( fieldName ) ; } catch ( Exception e ) { return 0 ; } if ( field == null ) { return 0 ; } Object ret = null ; try { ret = field . get ( obj ) ; } catch ( Exception e1 ) { return 0 ; } if ( obj == null ) { return 0 ; } L . pushObjectValue ( ret ) ; return 1 ; } }
target:  Checks if there is a field on the obj with the given name