Nonpublic Android resources are only hidden from autocomplete

Android libraries can set which resources are "public", exposed to other libraries or apps that use them. However, it looks like all resources for the app, no matter the defining library, go into the same pool. Even though nonpublic resources do not appear in the autocomplete of R lists, they will work perfectly fine if used anyway. Interestingly, resources identifiers with the same name are given the same numeric value across library boundaries.