def camelize(string)
      string
        .to_s
        .split('_')
        .map { |e| e.capitalize }
        .join
    end
def camelize(string)
      string
        .to_s
        .split('_')
        .map { |e| e.capitalize }
        .join
    end
Convert an underscored string to it's camelcase equivalent constant.

 @param [String] string
   the string to convert

 @return [String]