feat: Preventing injecting methods on a non-exist PackageNode

[notJoon]

fix #1099

[codecov]

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[thehowl]

validatePkgPath is dead-code and doesn't seem to address the issue at hand. Putting the PR back in draft for now

[thehowl]

why change this?

[thehowl]

For just two cases, we should use an if or a simple switch, a map is overkill and slow.

Why can crypto not be created?