presto-mongodb/src/main/java/io/prestosql/plugin/mongodb/MongoColumnHandle.java/MongoColumnHandle/equals
class MongoColumnHandle:    @Override
    public boolean equals(Object obj)
    {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        MongoColumnHandle other = (MongoColumnHandle) obj;
        return Objects.equals(name, other.name) &&
                Objects.equals(type, other.type) &&
                Objects.equals(hidden, other.hidden);
    }