presto-parser/src/main/java/io/prestosql/sql/tree/GroupingOperation.java/GroupingOperation/equals
class GroupingOperation:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        GroupingOperation other = (GroupingOperation) o;
        return Objects.equals(groupingColumns, other.groupingColumns);
    }