def valid?
      return false if @is_valid.nil?
      match_type_validator = EnumAttributeValidator.new('String', ["Exact", "StartsWith", "EndsWith", "Contains"])
      return false unless match_type_validator.valid?(@match_type)
      return true
    end
def valid?
      return false if @is_valid.nil?
      match_type_validator = EnumAttributeValidator.new('String', ["Exact", "StartsWith", "EndsWith", "Contains"])
      return false unless match_type_validator.valid?(@match_type)
      return true
    end
Check to see if the all the properties in the model are valid
 @return true if the model is valid