private void checkSeekNext() {
				if (soughtNext) {
					return;
				}
				soughtNext = true;
				next = seekNext();
			}
Get the vertical range where entries could exist that occlude the given vertical range

@param range the given range
@return the range possibly containing entries which occlude the given range
Ghidra/Debug/Framework-TraceModeling/src/main/java/ghidra/trace/database/map/AbstractDBTraceAddressSnapRangePropertyMapOcclusionIterable.java