thetool/application/Address/Address.php

<?php

class Address extends mfBaseModel {
  protected $forcestr = ['company','zip','phone','fax','mobile','note'];
  
  public function getFullName() {
    // Assumes "Firma1 Firma2" or "firstname lastname" as readable form
    $name = "";
    
    if($this->firstname && $this->lastname) {
      $name = $this->firstname . " " . $this->lastname;
    } elseif($this->lastname) {
        $name = $this->lastname;
    } elseif($this->firstname) {
      $name = $this->firstname;
    }
    
    return $name;
    
  }
}