DVStudioPageView typedef
The page at path as its route draws it: the page, its layouts and its
shell. With content, that widget stands where the page's body goes --
how Studio draws a document it is editing inside the page's own chrome.
With layout: false, the layouts are left out. Null for a path the
application has no view for.
Implementation
typedef DVStudioPageView = Widget? Function(
String path, {
Widget? content,
bool layout,
});