code: function getProvidersForLanguageId(languageId) {
          var result = [];
          if (_providers[languageId]) {
              result = result.concat(_providers[languageId]);
          }
          if (_providers['*']) {
              result = result.concat(_providers['*']);
          }
          return result;
      }
docs: Returns a list of providers registered for given languageId through register function