code: func (client *Client) GetSyntheticsLocations() ([]SyntheticsLocation, error) {
  	var out struct {
  		Locations []SyntheticsLocation `json:"locations,omitempty"`
  	}
  	if err := client.doJsonRequest("GET", "/v1/synthetics/locations", nil, &out); err != nil {
  		return nil, err
  	}
  	return out.Locations, nil
  }
docs: // GetSyntheticsLocations get all test locations