> `WritableElement` has always been one of the biggest peculiarities of 
> ClassFile API: it exposes element writing yet has no corresponding reading 
> ability exposed. Its existence creates a lot of API noise, increasing 
> maintenance cost in the long run. (This is an iceberg whose tip was exposed 
> in #14705)
> 
> Removal details:
> - `LocalVariable/LocalVariableType.writeTo`
> - `WritableElement`
> - In `BufWriter`:
>   - `writeList(List<WritableElement>)`
>   - `writeListIndices`: Hidden as we are not exposing 
> `BoundAttribute.readEntryList`
>   - `writeBytes(BufWriter other)`
> - `ClassReader.compare`: Avoid reading from `BufWriter`
> 
> Future implementation cleanup out of scope of this patch:
> - Annotation writing can be upgraded and move away from `Util.Writable`
> - The writing of CP indices and attributes can move to their dedicated methods
> - reading of entry list can pair up with writing of entry list in 
> ClassReader/BufWriter in future addition

Chen Liang has updated the pull request with a new target base due to a merge 
or a rebase. The pull request now contains 11 commits:

 - Merge branch 'master' of https://github.com/openjdk/jdk into fix/cf-apis
 - Merge branch 'master' of https://github.com/openjdk/jdk into fix/cf-apis
 - Merge branch 'master' of https://github.com/openjdk/jdk into fix/cf-apis
 - Merge BoundAttributeTest
 - Merge branch 'master' of https://github.com/openjdk/jdk into fix/cf-apis
 - Merge branch 'master' of https://github.com/openjdk/jdk into fix/cf-apis
 - 2 test failures
 - Web review cleanup
 - Remove WritableElement and reduce Writable usage
   
   The rest of Writable in annotations can be removed in later cleanup
 - Fix up usages of Util.write
 - ... and 1 more: https://git.openjdk.org/jdk/compare/22914e07...5ce1943a

-------------

Changes: https://git.openjdk.org/jdk/pull/20205/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20205&range=03
  Stats: 457 lines in 49 files changed: 99 ins; 198 del; 160 mod
  Patch: https://git.openjdk.org/jdk/pull/20205.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20205/head:pull/20205

PR: https://git.openjdk.org/jdk/pull/20205

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