code: public com.squareup.okhttp.Call getFwSystemsAsync(String datasource, String ifNoneMatch,
              final ApiCallback<List<FactionWarfareSystemsResponse>> callback) throws ApiException {
  
          com.squareup.okhttp.Call call = getFwSystemsValidateBeforeCall(datasource, ifNoneMatch, callback);
          Type localVarReturnType = new TypeToken<List<FactionWarfareSystemsResponse>>() {
          }.getType();
          apiClient.executeAsync(call, localVarReturnType, callback);
          return call;
      }
docs: Ownership of faction warfare systems (asynchronously) An overview of the
  current ownership of faction warfare solar systems --- This route is
  cached for up to 1800 seconds
  
  @param datasource
  The server name you would like data from (optional, default to
  tranquility)
  @param ifNoneMatch
  ETag from a previous request. A 304 will be returned if this
  matches the current ETag (optional)
  @param callback
  The callback to be executed when the API call finishes
  @return The request call
  @throws ApiException
  If fail to process the API call, e.g. serializing the request
  body object