Finally, each source file can define its own niladic init function to
set up whatever state is required. (Actually each file can have multiple
-init functions.) The only restriction is that, although
-goroutines can be launched during initialization, they will not begin
-execution until it completes; initialization always runs as a single thread
-of execution.
+init functions.)
And finally means finally: init is called after all the
variable declarations in the package have evaluated their initializers,
and those are evaluated only after all the imported packages have been