I can see "theResponse" variable in the code, it is declared but the instance is not created in memory. You are not using any SOQL query. As the "theResponse" object is null, you are using "theResponse.shipping_attention__c" in your code. so it is giving the nullpointer exception.
public Map<Id,Postal_Address__c> shippingRelatedAddresses()
{
return relatedAddresses(new Set<Id> theResponse.shipping_attention__c});
}
I can see "theResponse" variable in the code, it is declared but the instance is not created in memory. You are not using any SOQL query. As the "theResponse" object is null, you are using "theResponse.shipping_attention__c" in your code. so it is giving the nullpointer exception.
Please check if you are missing any query here.
Regards,
Praveen K.