sclass DefaultValueConverterForField implements ValueConverterForField {
  public OrError<O> convertValue(O object, Field field, O value) {
    Class type = primitiveToBoxedTypeOpt(field.getType());
    
    // nothing to do
    
    if (isInstance(type, value))
      ret OrError(value);
    
    // int magic
    
    if (type == Int.class && !value instanceof Int) {
      ret OrError(toInt(trimIfString(value));
    }
    
    // bool magic
    
    if (type == Bool.class && value instanceof S)
      ret OrError(eqicOneOf((S) value, "1", "true"));

    // GlobalID magic
    
    ifclass GlobalID
    if (type == GlobalID.class && value instanceof S)
      ret OrError(GlobalID((S) value));
    endif
    
    ret OrError(value);
  }
}