When designing a REST API, it would become beneficial for the generated swagger file to include an 'enum' that defines possible values for parameters representing static entity identifiers.

Consider the following scenario (see attachment) as an example:

Within the REST API method, there exists an input parameter of the Entity1 identifier type. However, the generated swagger file merely denotes this parameter as a string without providing further elucidation. By incorporating an 'enum' into the swagger, additional clarity can be imparted regarding the acceptable values for this parameter. In this instance, the enum would specify: [a, b, c].