/**
* Returns the list of fields that can be imported
*
* @param bool $prefix
*
* @return array
*/
static function &import($prefix = false)
{
if (!(self::$_import)) {
self::$_import = array();
$fields = self::fields();
foreach($fields as $name => $field) {
if (CRM_Utils_Array::value('import', $field)) {
if ($prefix) {
self::$_import['member_dues_duration'] = & $fields[$name];
} else {
self::$_import[$name] = & $fields[$name];
}
}
}
}
return self::$_import;
}
