Looks up a package, first in the list of loaded packages, then directly on the file system.
This function allows for lazy loading of packages, without needing to first scan all the available locations (as scan does).
The full name of the package to look up
The version the package must match
The PackageManager to use for adding packages
A Package if one was found, null if none exists.
See Implementation
Looks up a package, first in the list of loaded packages, then directly on the file system.
This function allows for lazy loading of packages, without needing to first scan all the available locations (as scan does).