docs: function (providerName) {
                  this.destroyAllMaps(providerName);
                  delete providers[providerName];
                  if (providerInstancesToDispose[providerName]) {
                      providerInstancesToDispose[providerName].$dispose();
                      delete providerInstancesToDispose[providerName];
                  }
                  delete providerInstances[providerName];
              }