GetInterval in OBBOBB test

[bsy6766]

I was looking on OBB vs OBB test and found that it's calling GetInterval() with obb1 twice.

GamePhysicsCookbook/Code/Geometry3D.cpp

Lines 384 to 388 in 15810bb

	bool OverlapOnAxis(const OBB& obb1, const OBB& obb2, const vec3& axis) {
	Interval a = GetInterval(obb1, axis);
	Interval b = GetInterval(obb1, axis);
	return ((b.min <= a.max) && (a.min <= b.max));
	}

Is this intentional? or is second call supposed to be with obb2?