default boolean isExternalReference() {
		return !getInnerClassName().startsWith(getOuterDeclaringClassName());
	}
There are some wierd cases where there can be inner-class entries of classes defined by other classes.
You can use this to filter those cases out.

@return {@code true} when this inner-class entry denotes an inner-class
reference to a class defined in another class.
recaf-core/src/main/java/software/coley/recaf/info/InnerClassInfo.java