index.js
function build_meta_information(object) {
      var res = {
        "timestamp": object.timestamp,
        "version": object.version,
        "changeset": object.changeset,
        "user": object.user,
        "uid": object.uid
      };
      for (var k in res)
        if (res[k] === undefined)
          delete res[k];
      return res;
    }
function build_meta_information(object) {
      var res = {
        "timestamp": object.timestamp,
        "version": object.version,
        "changeset": object.changeset,
        "user": object.user,
        "uid": object.uid
      };
      for (var k in res)
        if (res[k] === undefined)
          delete res[k];
      return res;
    }
function build_meta_information ( object ) { var res = { "timestamp" : object . timestamp , "version" : object . version , "changeset" : object . changeset , "user" : object . user , "uid" : object . uid } ; for ( var k in res ) if ( res [ k ] === undefined ) delete res [ k ] ; return res ; }
helper function to extract meta information
helper function to extract meta information