This PR replaces the word "surfaces" with "layers" to describe submessages.
The word "surface" has been used in README.md and elsewhere as a plain term to describe the concept of a submessage, but this is not appropriate, since a single submessage can have multiple surfaces.
This PR replaces the word "surfaces" with "layers" to describe submessages.
The word "surface" has been used in README.md and elsewhere as a plain term to describe the concept of a submessage, but this is not appropriate, since a single submessage can have multiple surfaces.