def get_payment(payment_id, options = {})
      request_params = {}
      response_xml = http_get(client, "#{@xero_url}/Payments/#{payment_id}", request_params)
      parse_response(response_xml, {:request_params => request_params}, {:request_signature => 'GET/payments'})
    end
def get_payment(payment_id, options = {})
      request_params = {}
      response_xml = http_get(client, "#{@xero_url}/Payments/#{payment_id}", request_params)
      parse_response(response_xml, {:request_params => request_params}, {:request_signature => 'GET/payments'})
    end
Gets a single Payment for a specific organsation in Xero