Medication and MedicationRequest addIdentifier variable clashing

[ivanwilliammd]

Describe the bug
public function addIdentifier($identifier)
{
$identifier['system'] = 'http://sys-ids.kemkes.go.id/medication/'.$this->organization_id;
$identifier['value'] = $identifier;
$identifier['use'] = 'official';

    $this->medication['identifier'][] = $identifier;
}

$identifier variable passed to function clash with $identifier used in addIdentifier

To Reproduce

Expected behavior
different variable assignment

Additional context
N/A