tree 307b5baf7962f2930bb0cb6281898091c2022ca6
parent 5a463e749c6ca8aca352ea0d5a00763954605e21
author Yigit Boyar <yboyar@google.com> 1593631464 -0700
committer Yigit Boyar <yboyar@google.com> 1593644428 -0700

Make getTypeElement calls null-safe

We use elementUtils.getTypeElement in many places and sometimes it can be null,
sometimes it shouldn't.

This CL moves all of those calls into extension functions on the
processing environment where the expected nullability is explicit
in the method call.

There was also many usages of getTypeElement().asType() and
getTypeElement(typeName.toString) so I've created find/requreTypeMirror
and overloads that receive TypeName.

Bug: 160323720
Test: existing test suite
Change-Id: I3f31a38c86abd1b43a8a93d9b457c61bac802167