code: function getHierarchy(loggerName) {
      if (!loggerName) {
          return [];
      }
      var names = [];
      var p = 0;
      while (p !== -1) {
          p = loggerName.indexOf('/', p);
          if (p !== -1) {
              names.push(loggerName.substring(0, p));
              // loggerName = loggerName.substring(p + 1);
              p++;
          }
      }
      return names;
  }
docs: figure out the names of the potential parent loggers
  if loggername is 'moduleName/something/otherthing'
  should return
  - moduleName/something
  - moduleName