GetRequestWithBodyException
Thrown by MosaicNetworkImpl when an HTTP GET request would be sent with a non-null body — a real validation Mosaic's own network layer performs that isn't documented anywhere on the DSL side (SendNetworkRequest/GetScreen/RefreshScreen all accept a body regardless of method, and this only surfaces at request time). Any event issuing a GET with a non-null body fails with this as its onFailure cause.
Parameters
url
the request URL that triggered the error, included in the message.