src/LightSaml/Model/Metadata/RoleDescriptor.php
public function addContactPerson(ContactPerson $contactPerson)
    {
        if (false == is_array($this->contactPersons)) {
            $this->contactPersons = array();
        }
        $this->contactPersons[] = $contactPerson;

        return $this;
    }
public function addContactPerson(ContactPerson $contactPerson)
    {
        if (false == is_array($this->contactPersons)) {
            $this->contactPersons = array();
        }
        $this->contactPersons[] = $contactPerson;

        return $this;
    }
@param ContactPerson $contactPerson

@return RoleDescriptor