public function buildQuickForm()
 {
     // load realtionships
     $relationshipOptions = $this->getEligibleRelationships();
     $this->addElement('select', 'hh_mode', ts('Household Mode', array('domain' => 'de.systopia.householdmerge')), CRM_Householdmerge_Logic_Configuration::getHouseholdModeOptions(), array('class' => 'crm-select2'));
     $this->addElement('select', 'hh_head_mode', ts('Household Head Mode', array('domain' => 'de.systopia.householdmerge')), CRM_Householdmerge_Logic_Configuration::getHouseholdHeadModeOptions(), array('class' => 'crm-select2'));
     $this->addElement('select', 'hh_member_relation', ts('Household Member Relationship', array('domain' => 'de.systopia.householdmerge')), $relationshipOptions, array('class' => 'crm-select2'));
     $this->addElement('select', 'hh_head_relation', ts('Household Head Relationship', array('domain' => 'de.systopia.householdmerge')), $relationshipOptions, array('class' => 'crm-select2'));
     parent::buildQuickForm();
 }