Definitions within next replace those in base by name; if all of next's are maybe, they are appended instead (turning existing ones maybe too), like appendEnvironment.
next
base
Environment.overwrite - for details on how definitions are handled.
Optional
Definitions within
nextreplace those inbaseby name; if all ofnext's are maybe, they are appended instead (turning existing ones maybe too), like appendEnvironment.See
Environment.overwrite - for details on how definitions are handled.