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

        Assignments that = (Assignments) o;

        return assignments.equals(that.assignments);
    }