The types of `DocTree` parameters in some methods in `TagletWriter` can be changed from `DocTree` to more specific subtypes. Doing so makes the code less prone to incorrect calls, and removes the need for downcasting the argument in the method bodies.
This means the implementation of those methods can often be simplified. In addition, the call sites need to be improved, and with the help of some improvements to methods in `Utils`, the methods that access different kinds of trees can return the lists using a more specific subtype as well. Finally, a quick analysis of some of the `Utils` methods to access different kinds of trees shows that there are some more convenient methods that can be used instead. ------------- Commit messages: - JDK-8254052: improve type specificity of TagletWriter and friends Changes: https://git.openjdk.java.net/jdk/pull/517/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=517&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8254052 Stats: 127 lines in 17 files changed: 51 ins; 8 del; 68 mod Patch: https://git.openjdk.java.net/jdk/pull/517.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/517/head:pull/517 PR: https://git.openjdk.java.net/jdk/pull/517
