presto-base-jdbc/src/main/java/io/prestosql/plugin/jdbc/ForwardingJdbcClient.java/ForwardingJdbcClient/dropColumn
class ForwardingJdbcClient:    @Override
    public void dropColumn(JdbcIdentity identity, JdbcTableHandle handle, JdbcColumnHandle column)
    {
        getDelegate().dropColumn(identity, handle, column);
    }