RFR: 8258777: SkinBase: add api to un-/register invalidation-/listChange listeners [v2]

[Jeanette Winzenburg]

On Thu, 25 Mar 2021 14:07:24 GMT, Jeanette Winzenburg <fastegal at openjdk.org> wrote:

>> I see. I recommend that they be improved in this PR. I don't know if this will need to be part of the CSR, though.
>
> @nlisker and @Kevin so we agree, thanks :)
> 
> my plan: 
> 
> - will work on the exact doc along the lines of Nir's suggestion for the un-/registerInvalidationListener methods
> - once that's basically agreed upon, will c&p the spec (with adjustments) to the methods for the other listener types
> - at a last step, create the csr draft (that would be a patch for the changeListener methods and simply added spec for the new methods, I assume?)

hmm ... failing checks, why?

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PR: https://git.openjdk.java.net/jfx/pull/409