presto-main/src/main/java/io/prestosql/sql/planner/SortExpressionContext.java/SortExpressionContext/equals
class SortExpressionContext:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        SortExpressionContext that = (SortExpressionContext) o;
        return Objects.equals(sortExpression, that.sortExpression) &&
                Objects.equals(searchExpressions, that.searchExpressions);
    }