public boolean isHorizontal() {
		return isHorizontal == null || isHorizontal;
	}
Assumes "this" is a major axis, and tells whether the minor axis argument is valid for
the major value.  Cannot have both major and minor be the same horizontal/vertical bearing.
Note that {@link #CENTER} can be horizontal or vertical, so this method should not count
this value as a bad minor value, as it also represents a good value.
@param minor the minor value to check
@return true if valid.
Ghidra/Framework/Docking/src/main/java/docking/widgets/shapes/Location.java