void (_Fields field, @org.apache.thrift.annotation.Nullable java.lang.Object value) { switch (field) { case EVALUATION_EXPRESSION: if (value == null) { unsetEvaluationExpression(); } else { setEvaluationExpression((java.lang.String)value); } break; case VALUE: if (value == null) { unsetValue(); } else { setValue((java.lang.String)value); } break; } }