code: function (classpath, id) {
              this._logs[this._nbLogs++] = {
                  classpath : classpath,
                  id : id,
                  stop : (new Date()).getTime()
              };
          }
docs: Stops a time measure. If the id is not specified, stop the last measure with this classpath.
  @param {String} classpath
  @param {String} id