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

        SheetsColumnHandle other = (SheetsColumnHandle) obj;
        return Objects.equals(this.columnName, other.columnName);
    }