check if argument is true concode_field_sep PlaceHolder placeHolder concode_field_sep T notNull concode_elem_sep String format concode_elem_sep boolean isFalse concode_elem_sep T notEmpty concode_elem_sep T notEmpty concode_elem_sep T notEmpty concode_elem_sep T withinRange
boolean function ( final boolean arg0 , final String arg1 , final Object ... arg2 ) { if ( arg0 == false ) { throw new IllegalArgumentException ( format ( arg1 , arg2 ) ) ; } return arg0 ; }