Example endpoint return a list of colors by palette
    This is using docstring for specifications
    ---
    tags:
      - colors
    parameters:
      - name: palette
        in: path
        type: string
        enum: ['all', 'rgb', 'cmyk']
        required: true
        default: all
        description: Which palette to filter?
    operationId: get_colors
    consumes:
      - application/json
    produces:
      - application/json
    security:
      colors_auth:
        - 'write:colors'
        - 'read:colors'
    schemes: ['http', 'https']
    deprecated: false
    externalDocs:
      description: Project repository
      url: http://github.com/rochacbruno/flasgger
    definitions:
      Palette:
        type: object
        properties:
          palette_name:
            type: array
            items:
              $ref: '#/definitions/Color'
      Color:
        type: string
    responses:
      200:
        description: A list of colors (may be filtered by palette)
        schema:
          $ref: '#/definitions/Palette'
        examples:
          rgb: ['red', 'green', 'blue']

def colors(palette):
    """Example endpoint return a list of colors by palette
    This is using docstring for specifications
    ---
    tags:
      - colors
    parameters:
      - name: palette
        in: path
        type: string
        enum: ['all', 'rgb', 'cmyk']
        required: true
        default: all
        description: Which palette to filter?
    operationId: get_colors
    consumes:
      - application/json
    produces:
      - application/json
    security:
      colors_auth:
        - 'write:colors'
        - 'read:colors'
    schemes: ['http', 'https']
    deprecated: false
    externalDocs:
      description: Project repository
      url: http://github.com/rochacbruno/flasgger
    definitions:
      Palette:
        type: object
        properties:
          palette_name:
            type: array
            items:
              $ref: '#/definitions/Color'
      Color:
        type: string
    responses:
      200:
        description: A list of colors (may be filtered by palette)
        schema:
          $ref: '#/definitions/Palette'
        examples:
          rgb: ['red', 'green', 'blue']
    """
    all_colors = {
        'cmyk': ['cian', 'magenta', 'yellow', 'black'],
        'rgb': ['red', 'green', 'blue']
    }
    if palette == 'all':
        result = all_colors
    else:
        result = {palette: all_colors.get(palette)}

    return jsonify(result)