Make isAliasedTypeAnnotation() protected (#7667)

Author: mernst

docs/CHANGELOG.md

@@ -16,7 +16,11 @@ Removed deprecated names "builder", "object.construction", and
 ### Implementation details
 
 New method annotation `@DoesNotUnrefineReceiver`.
-`AnnotatedTypeFactory` has a new method `hasDoesNotUnrefineReceiver()`.
+
+In `AnnotatedTypeFactory`:
+
+* new method `hasDoesNotUnrefineReceiver()`.
+* `isAliasedTypeAnnotation()` is now protected rather than public.
 
 ### Closed issues
 

framework/src/main/java/org/checkerframework/framework/type/AnnotatedTypeFactory.java

@@ -3554,7 +3554,7 @@ public AnnotationMirror canonicalAnnotation(AnnotationMirror a) {
    * @param annoClass an annotation class
    * @return true if the given annotation class is an alias for some other annotation
    */
-  public boolean isAliasedTypeAnnotation(Class<?> annoClass) {
+  protected boolean isAliasedTypeAnnotation(Class<?> annoClass) {
     return aliases.containsKey(annoClass.getCanonicalName());
   }