Am I doing the right?

function DecadeSelect($field) {

$currentDecade = substr(date('Y'),0,3)*10;
 BugFu::log($field);
// Create choices array
$field['choices'] = array();
// Add blank first selection; remove if unnecessary
$field['choices'][''] = '--Select Decade-- ';

// Loop through a range of years and add to field 'choices'. Change range as needed.
for ($decade = $currentDecade; $decade <= $currentDecade-150; $decade+10) {
  BugFu::log("The decade is: $decade <br>");

    $field['choices'][$decade] = $decade;

}

// Return the field
return $field;

}

add_filter(‘acf/load_field/key=field_63442a0323a13’, ‘DecadeSelect’);

Am I doing this the right way, and where would you expect the log to be?