@Override
		public V get(N n) {
			Entry<S, V> ent = getEntry(n);
			return ent == null ? null : ent.getValue();
		}
Create a span map on the given domain

<p>
Extensions should invoke this as a super constructor with a fixed domain. See
{@link DefaultULongSpanMap} for an example.

@param domain the domain
Ghidra/Framework/Emulation/src/main/java/generic/Span.java