$membershipType = civicrm_api3('membership_type', 'getsingle', array('id' => $params['membership_type_id'], 'return' => 'relationship_type_id, relationship_direction'));
$relationshipTypes = $membershipType['relationship_type_id'];
if(empty($relationshipTypes)) {
$membershipType = civicrm_api3('membership_type', 'getsingle', array('id' => $params['membership_type_id'], 'return' => 'relationship_type_id, relationship_direction'));
$relationshipTypes = $membershipType['relationship_type_id'];
if(empty($relationshipTypes)) {