If a DocTreePath points to a primitive type or other type that does not have a corresponding element, e.g. as in `{@link byte}`, then DocTrees.getElement(DocTreePath) will return the javac-internal ClassSymbol for `byte`, but should probably return `null`.

For reference, `Elements.getTypeElement(CharSequence)` returns null, by filtering out javac-internal symbols.

Related, DocTrees.getElement returns the element for the base component type of an array, but should probably return `null`.

Related, should check out the following methods that return type elements from strings

src/java.compiler/share/classes/javax/lang/model/util//Elements.java: TypeElement getTypeElement(CharSequence name);
src/java.compiler/share/classes/javax/lang/model/util//Elements.java: default TypeElement getTypeElement(ModuleElement module, CharSequence name) {
src/java.compiler/share/classes/javax/lang/model/util//Elements.java: default Set<? extends TypeElement> getAllTypeElements(CharSequence name) {