public interface ProgressiveLoading
Settings related to the "progressive loading" pattern, which causes data to be loaded 
 progressively, so that users can request more rows by scrolling off the bottom of the currently
 visible rows, but cannot cause direct movement to some arbitrary position in  the dataset (as
 is the case with ordinary, non-progressive loading).  This pattern may give a better user
 experience with large datasets.
- See Also:
- DataSource.getProgressiveLoading(),- DataSource.progressiveLoadingThreshold,- DataSource.lookAhead,- DataSource.endGap,- DSRequest.getProgressiveLoading(),- OperationBinding.progressiveLoading,- ResultTree.getProgressiveLoading(),- SelectItem.getProgressiveLoading(),- ComboBoxItem.getProgressiveLoading()