get the maximal number of arguments needed . the command opcode is included in the number of arguments . if this method return -1 , the command can take any number of arguments . concode_field_sep PlaceHolder placeHolder concode_field_sep boolean canExecute concode_elem_sep CmdType getType concode_elem_sep int getMinimalArgsCountNeeded concode_elem_sep void execute
int function ( ) { return 2 ; }