code: func (c *SearchCall) FailureReason(failureReason string) *SearchCall {
  	c.urlParams_.Set("failure_reason", failureReason)
  	return c
  }
docs: // FailureReason sets the optional parameter "failure_reason":
  //
  // Possible values:
  //   "BUILDBUCKET_FAILURE"
  //   "BUILD_FAILURE"
  //   "INFRA_FAILURE"
  //   "INVALID_BUILD_DEFINITION"