private int mapStringToPostalAddressType(String label) {
        int postalAddressType;
        switch (label) {
            case "home":
                postalAddressType = ContactsContract.CommonDataKinds.StructuredPostal.TYPE_HOME;
                break;
            case "work":
                postalAddressType = ContactsContract.CommonDataKinds.StructuredPostal.TYPE_WORK;
                break;
            default:
                postalAddressType = ContactsContract.CommonDataKinds.StructuredPostal.TYPE_CUSTOM;
                break;
        }
        return postalAddressType;
    }
Retrieves <code>contact</code> for contact, or <code>null</code> if not
available.

@param contactId contact identifier, <code>recordID</code>
android/src/main/java/com/rt2zz/reactnativecontacts/impl/ContactsManagerImpl.java