def set(key, value)
      method_name = "validate_#{key}"
      send(method_name.to_sym, value) if respond_to?(method_name.to_sym)
      @data[key.to_s] = value
    end
def set(key, value)
      method_name = "validate_#{key}"
      send(method_name.to_sym, value) if respond_to?(method_name.to_sym)
      @data[key.to_s] = value
    end
Set a resource attribute with the given value and call any validation method if necessary
 @param [String] key attribute name
 @param value value to assign to the given attribute
 @note Keys will be converted to strings