def set(pr, name, color)
      message = ""
      if label?(name)
        message = "Set #{name} label. (Color: #{color})"
      else
        message = "Add #{name} new label. (Color: #{color})"
        add_label(name, color)
      end
      github.api.add_labels_to_an_issue(repo, pr, [name])
      puts message
    end
def set(pr, name, color)
      message = ""
      if label?(name)
        message = "Set #{name} label. (Color: #{color})"
      else
        message = "Add #{name} new label. (Color: #{color})"
        add_label(name, color)
      end
      github.api.add_labels_to_an_issue(repo, pr, [name])
      puts message
    end
Set any labels to PR by this.
 @param   [Number] pr
          A number of issue or pull request for set label.
 @param   [String] name
          A new label name.
 @param   [String] color
          A color, in hex, without the leading #. Default is "fef2c0"
 @return  [void]