Support lst parameters for JavaTemplate in method Parameters, ClassDecl body...

What problem are you trying to solve?

At this moment, JavaTemplate uses a __P__.p() method invocation to replace the parameter with the lst element. However, in certain locations the compiler crashes on MethodInvocations.

Replicated this in a unit test in https://github.com/openrewrite/rewrite/tree/show-issue-javatemplate-method-as-parameter. Copy the sysout template to a java scratch file and see that the template is invalid for the #{any()}

Describe the solution you'd like

Perhaps smart(er) template that allows for this. Perhaps we could use some kind of constant that we create in __P__ or __M__ and then in templating also resolve these FieldAccesses?

Have you considered any alternatives or workarounds?

I have manually worked around this limitation by setting Parametes myself on the generated template instance.

Are you interested in contributing this feature to OpenRewrite?

Obviously :)

Start with the unit-test reproduction on the show-issue-javatemplate-method-as-parameter branch and copy its sysout template into a Java scratch file. Investigate JavaTemplate parameter handling for method Parameters and ClassDecl bodies; done means lst parameters work there without the compiler crash or invalid #{any()} template behavior, with the reproduction covered by a unit test.