@Override
	public double distY(Long y1, Long y2) {
		if (y2 == null) {
			return Double.POSITIVE_INFINITY;
		}
		if (y1 == null) {
			return Double.NEGATIVE_INFINITY;
		}
		if (y2 > y1) {
			return y2 - y1;
		}
		else {
			return y1 - y2;
		}
	}
Get the trace-address-snap space for a given address space

<p>
Because this synchronizes on a cache of spaces, it should only be called by space
constructors, never by entry constructors.

@param space the address space
@return the trace-address-snap space
Ghidra/Debug/Framework-TraceModeling/src/main/java/ghidra/trace/model/TraceAddressSnapSpace.java