code: func (idx *Index) Intersect(rows ...*PQLRowQuery) *PQLRowQuery {
  	if len(rows) < 1 {
  		return NewPQLRowQuery("", idx, NewError("Intersect operation requires at least 1 row"))
  	}
  	return idx.rowOperation("Intersect", rows...)
  }
docs: // Intersect creates an Intersect query.
  // Intersect performs a logical AND on the results of each ROW_CALL query passed to it.