It avoids polluting your request classes with side channel details that your service may not even be concerned with at all; it makes for nice abstractions.
It allows for the opaque propagation of side channel information, where intermediates don't need to know what's there.
side-channel-with-well-defined-propagation-rules is pretty useful.
It allows for the opaque propagation of side channel information, where intermediates don't need to know what's there.
side-channel-with-well-defined-propagation-rules is pretty useful.