presto-main/src/main/java/io/prestosql/sql/planner/plan/PlanFragmentId.java/PlanFragmentId/equals
class PlanFragmentId:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        PlanFragmentId that = (PlanFragmentId) o;

        if (!id.equals(that.id)) {
            return false;
        }

        return true;
    }