@Override
      public void onNewResult(DataSource<T> dataSource) {
        if (dataSource.hasResult()) {
          IncreasingQualityDataSource.this.onDataSourceNewResult(mIndex, dataSource);
        } else if (dataSource.isFinished()) {
          IncreasingQualityDataSource.this.onDataSourceFailed(mIndex, dataSource);
        }
      }
Creates a new data source supplier with increasing-quality strategy with optional lazy state
creation.

<p>Note: for performance reasons the list doesn't get cloned, so the caller of this method
should not modify the list once passed in here.

@param dataSourceSuppliers list of underlying suppliers
@param dataSourceLazy if true, the state of data source would be created only if necessary
fbcore/src/main/java/com/facebook/datasource/IncreasingQualityDataSourceSupplier.java