Represents autofiltering for the specified worksheet.
Filtering data is a quick and easy way to find and work with a subset of data in a range of cells or table. For example, you can filter to see only the values that you specify, filter to see the top or bottom values, or filter to quickly see duplicate values.
TODO YK: For now (Aug 2010) POI only supports setting a basic autofilter on a range of cells. In future, when we support more auto-filter functions like custom criteria, sort, etc. we will add corresponding methods to this interface.