materio-base-d7/sites/all/modules/contrib/fields/prepopulate/prepopulate.install

<?php

/**
 * Implementation of hook_install().
 */
function prepopulate_install() {
  $ret = array();
  // Ensure that prepopulate sinks to the bottom during hook calls
  // there should be a UI for this at some point.
  $ret[] = db_query("UPDATE {system} SET weight = 10 WHERE name = 'prepopulate'");
  return $ret;
}