code: public com.squareup.okhttp.Call getOpportunitiesTasksTaskIdAsync(Integer taskId, String datasource,
              String ifNoneMatch, final ApiCallback<OpportunitiesTasksResponse> callback) throws ApiException {
  
          com.squareup.okhttp.Call call = getOpportunitiesTasksTaskIdValidateBeforeCall(taskId, datasource, ifNoneMatch,
                  callback);
          Type localVarReturnType = new TypeToken<OpportunitiesTasksResponse>() {
          }.getType();
          apiClient.executeAsync(call, localVarReturnType, callback);
          return call;
      }
docs: Get opportunities task (asynchronously) Return information of an
  opportunities task --- This route expires daily at 11:05
  
  @param taskId
  ID of an opportunities task (required)
  @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