s useful
           * for editors wishing to use the element.
           *
           * @attribute inputValue
           * @type string
           * @default ''
           */
          inputValue: {
            type: String,
            value: ''
          }
        },
        setLanguage: function(lang) {
          return 'language-' + lang;
        },
        setLineNumbers: function(lineNumbers) {
          if (lineNumbers) {
            return 'line-numbers';
          }
          return '';

        },