openapi: 3.0.3

components:
  headers:
    differentComponentName_A:
      schema:
        type: string
        enum:
          - option_1
          - option_2
        default: option_1
      description: Let's mention both options, option_1 and option_2.
    differentComponentName_B:
      schema:
        type: string
        enum:
          - option_1
        default: option_1
      description: Let's mention the only option, option_1.