code: @Override
  	public <T> EntitySequence getSequence(TableDefinition tableDef, Iterable<T> collection) {
  		return getSequence(tableDef, collection, null, null);
  	}
docs: /* (non-Javadoc)
  @see com.dell.doradus.search.aggregate.EntitySequenceFactory#getSequence(com.dell.doradus.common.TableDefinition, java.lang.Iterable)