prow/github/client.go
func (c *Client) CreateCommentReaction(org, repo string, id int, reaction string) error {
	c.log("CreateCommentReaction", org, repo, id, reaction)
	r := Reaction{Content: reaction}
	_, err := c.request(&request{
		method:      http.MethodPost,
		path:        fmt.Sprintf("/repos/%s/%s/issues/comments/%d/reactions", org, repo, id),
		accept:      "application/vnd.github.squirrel-girl-preview",
		exitCodes:   []int{201},
		requestBody: &r,
	}, nil)
	return err
}
func (c *Client) CreateCommentReaction(org, repo string, id int, reaction string) error {
	c.log("CreateCommentReaction", org, repo, id, reaction)
	r := Reaction{Content: reaction}
	_, err := c.request(&request{
		method:      http.MethodPost,
		path:        fmt.Sprintf("/repos/%s/%s/issues/comments/%d/reactions", org, repo, id),
		accept:      "application/vnd.github.squirrel-girl-preview",
		exitCodes:   []int{201},
		requestBody: &r,
	}, nil)
	return err
}
// CreateCommentReaction responds emotionally to comment id in org/repo.
//
// See https://developer.github.com/v3/reactions/#create-reaction-for-an-issue-comment