What is the meaning of "Failed to get sources" in Maven dependency and why are stub sources generated by the disassembler?

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"Failed to get sources" means that Maven was unable to retrieve the source code files for a certain dependency. This can happen due to several reasons, such as the dependency not having a source code available, the source code being located in a different repository or being behind a paywall, or a connectivity issue.

Stub sources are generated by the disassembler to provide a representation of the code without exposing the original source code. This can be useful for code analysis and debugging, as it allows developers to see the structure and references of the code without actually viewing the original source files. Stub sources can be generated for various programming languages, including Java, C#, and C++.