How to return an array of objects in SwaggerHub?

An array of objects is defined as follows. The value of items must be a single model that describes the array items.

definitions:
  AllContacts:
    type: array
    items:
      $ref: '#/definitions/ContactModel'

  ContactModel:
    type: object
    properties:
      id:
        type: integer
        example: 1
      firstName:
        type: string
        example: Sherlock
      lastName:
        type: string
        example: Holmes

By default, Swagger UI displays the array examples with just one item, like so:

[
  {
     "id": 1,
     "firstName": "Sherlock",
     "lastName": "Holmes"
  }
]

If you want the array example to include multiple items, specify the multi-item example in the array model:

definitions:
  AllContacts:
    type: array
    items:
      $ref: '#/definitions/ContactModel1'
    example:
      - id: 1
        firstName: Sherlock
        lastName: Holmes
      - id: 2
        firstName: John
        lastName: Watson