docs: function (providerName, provider) {
                  if (providers[providerName]) {
                      this.$logError(this.DUPLICATED_PROVIDER, providerName);
                  } else {
                      if (ariaUtilsType.isObject(provider)) {
                          if (this._isValidProvider(provider)) {
                              providerInstances[providerName] = provider;
                              providers[providerName] = provider;
                          } else {
                              this.$logError(this.INVALID_PROVIDER, providerName);
                          }
                      } else {
                          providers[providerName] = provider;
                      }
                  }
              }