presto-main/src/main/java/io/prestosql/sql/planner/Partitioning.java/Partitioning/equals
class Partitioning:    @Override
    public boolean equals(Object obj)
    {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        final Partitioning other = (Partitioning) obj;
        return Objects.equals(this.handle, other.handle) &&
                Objects.equals(this.arguments, other.arguments);
    }