[Question] How to map parameter annotations to corresponding parameters

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Hi all,
As per the javadoc on `MethodVisitor.visitParameterAnnotation`, the
`parameter` argument may not correspond to the index in the parameter
descriptor, then how should I map parameter annotations and parameters
correctly?

At first I thought I cound use parameter access_flags from
`MethodVisitor.visitParameter`, and ignore those formal parameters who are
`ACC_SYNTHETIC` or `ACC_MANDATED`, then the remaining formal parameters and
the parameter annotations would just match.

But  it turns out that `MethodParameters` attribute doesn't exist in classfile
by default, I need to pass `-parameters` to javac to generate it, and
`LocalVariableTable` doesn't have access_flags either. That means parameter
access_flags are not available in classfile, and I can't tell which parameter
is synthetic in method descriptor.

I'm also wondering how java reflection framework does the mapping.

I posted a similar question on stackoverflow, you can also give your advice
there.
https://stackoverflow.com/questions/74446059/how-to-map-parameter-annotations-to-corresponding-method-parameter-in-classfile

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