initialPath property
The path to replace / as default initial route path upon load.
Note that (if set to anything other than / (default)),
you will not be able to navigate to / by manually typing
it in the URL bar, because it will always be transformed to initialPath,
but you will be able to get to / by popping pages with back button,
if there are pages in BeamLocation.buildPages that will build
when there are no path segments.
Implementation
final String initialPath;