docs: function(params) {
          var self = this,
              stanzaParams = {
                  type: 'chat',
                  from: self.helpers.getUserCurrentJid(),
                  id: Utils.getBsonObjectId(),
                  to: this.helpers.jidOrUserId(params.userId)
              },
              builder = Utils.getEnv().browser ? $msg : XMPP.Stanza;
  
          var stanza = chatUtils.createStanza(builder, stanzaParams);
  
          stanza.c('received', {
              xmlns: chatUtils.MARKERS.MARKERS,
              id: params.messageId
          }).up();
  
          stanza.c('extraParams', {
              xmlns: chatUtils.MARKERS.CLIENT
          }).c('dialog_id').t(params.dialogId);
  
          if(Utils.getEnv().browser) {
              self.connection.send(stanza);
          } else {
              self.Client.send(stanza);
          }
      }