public function getFieldTypes()
    {
        $output = array(
            'activity'    => $this->_('Activity'),
            'appointment' => $this->_('Appointment'),
            'boolean'     => $this->_('Boolean'),
            'caretaker'   => $this->_('Caretaker'),
            'consent'     => $this->_('Consent'),
            'date'        => $this->_('Date'),
            'text'        => $this->_('Free text'),
            'textarea'    => $this->_('Long free text'),
            'location'    => $this->_('Location'),
            'datetime'    => $this->_('Moment in time'),
            'procedure'   => $this->_('Procedure'),
            'relation'    => $this->_('Relation'),
            'select'      => $this->_('Select one'),
            'multiselect' => $this->_('Select multiple'),
            'track'       => $this->_('Track'),
            );

        asort($output);
        return $output;
    }