Controls how history providers should handle multiple sources for the requested paths.
all
$source
values
A sourceRef specified on an individual path remains an explicit filter; all only expands paths that do not already specify a source.
sourceRef
Controls how history providers should handle multiple sources for the requested paths.
all: return values split by source, with$sourceset invaluesA
sourceRefspecified on an individual path remains an explicit filter;allonly expands paths that do not already specify a source.