@Override
            public Void visitTypeVariable(TypeVariable t, ImmutableSet.Builder<TypeElement> p) {
                t.getLowerBound().accept(this, p);
                t.getUpperBound().accept(this, p);
                return null;
            }
Utilities related to {@link TypeMirror} instances.

@author Gregory Kick
@since 2.0
android/annotation_processors/permission-requester-compiler/src/main/java/github/tornaco/permission/compiler/common/MoreTypes.java