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

        ElasticsearchColumnHandle other = (ElasticsearchColumnHandle) obj;
        return Objects.equals(this.getName(), other.getName()) &&
                Objects.equals(this.getType(), other.getType());
    }