RFR: 8313961: Enhance identification of special serialization methods

[Raffaello Giulietti]

On Mon, 21 Aug 2023 15:46:53 GMT, Raffaello Giulietti <rgiulietti at openjdk.org> wrote:

> This improves the identification of the serialization magic fields and methods.

The test is a bit unusual, in that it uses the [Classfile API](https://openjdk.org/jeps/8280389). It is used to generate two classes that cannot be expressed in the Java language, as they contain multiple fields with the same name but different types, and mulitple methods with the same name and parameter types but different return types.

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PR Comment: https://git.openjdk.org/jdk/pull/15364#issuecomment-1686607139