question: public long readTimeoutValue ( Column < ? > column ) { if ( columnFamily . getDefaultValueSerializer ( ) == ByteBufferSerializer . get ( ) || columnFamily . getDefaultValueSerializer ( ) == LongSerializer . get ( ) ) { return column . getLongValue ( ) ; } else { return Long . parseLong ( column . getStringValue ( ) ) ; } }
target:  Read the expiration time from the column value