anchor.diff:  -define(ATTACHMENT, <<"attachment">>).
   -define(GENERATE, <<"generate">>).
   -define(CARRIERS, <<"carriers">>).
  +-define(CUSTOMERS, <<"customers">>).
  +-define(SERVICE_PLANS, <<"onbill_service_plans">>).
   -define(MODB, <<"onbills_modb">>).
   -define(RESELLER_VARIABLES, <<"onbill_reseller_variables">>).
   -define(NOTIFICATION_MIME_TYPES, [{<<"text">>, <<"html">>}
  
positive.code: validate(Context, Id) ->
      validate_onbill(Context, Id, cb_context:req_verb(Context)).
  validate(Context, ?CARRIERS, Id) ->
      validate_onbill(Context, ?CARRIERS, Id, cb_context:req_verb(Context)).
  validate(Context,?CARRIERS, Id, AttachmentId) ->
      validate_onbill(Context,?CARRIERS, Id, AttachmentId, cb_context:req_verb(Context));
  validate(Context,?MODB, Id, ?ATTACHMENT) ->
  
negative.code:     [?HTTP_GET, ?HTTP_POST].
  allowed_methods(?CARRIERS,_) ->
      [?HTTP_GET, ?HTTP_POST];
  allowed_methods(?CUSTOMERS,_) ->
      [?HTTP_GET, ?HTTP_POST];
  allowed_methods(?SERVICE_PLANS,_) ->
      [?HTTP_GET, ?HTTP_POST];
  allowed_methods(?MODB,_) ->
      [?HTTP_GET].
  allowed_methods(?CARRIERS,_,_) ->
  