docs: function getMLineIndex(sdpLines, mediaType) {
        var targetMLine = 'm=' + mediaType;
  
        // Find the index of the media line for +type+
        return OT.$.findIndex(sdpLines, function(line) {
          if (line.indexOf(targetMLine) !== -1) {
            return true;
          }
  
          return false;
        });
      }