code: function queryCommandSupported(command) {
          command = command.toLowerCase();
  
          if (commands.exec[command]) {
            return true;
          }
  
          // Browser commands
          try {
            return editor.getDoc().queryCommandSupported(command);
          } catch (ex) {
            // Fails sometimes see bug: 1896577
          }
  
          return false;
        }
docs: Returns true/false if the command is supported or not.
  
  @method queryCommandSupported
  @param {String} command Command that we check support for.
  @return {Boolean} true/false if the command is supported or not.