public ReturnCode filterCell(final Cell c) throws IOException {
    return ReturnCode.INCLUDE;
  }
A way to filter based on the column family, column qualifier and/or the column value. Return
code is described below. This allows filters to filter only certain number of columns, then
terminate without matching ever column. If filterRowKey returns true, filterCell needs to be
consistent with it. filterCell can assume that filterRowKey has already been called for the
row. If your filter returns <code>ReturnCode.NEXT_ROW</code>, it should return
<code>ReturnCode.NEXT_ROW</code> until {@link #reset()} is called just in case the caller calls
for the next row. Concrete implementers can signal a failure condition in their code by
throwing an {@link IOException}.
@param c the Cell in question
@return code as described below
@throws IOException in case an I/O or an filter specific failure needs to be signaled.
@see Filter.ReturnCode
hbase-client/src/main/java/org/apache/hadoop/hbase/filter/Filter.java