protected void clearContext(Lifespan span, AddressRange range) {
		DBTraceRegisterContextSpace ctxSpace =
			space.trace.getRegisterContextManager().get(space, false);
		if (ctxSpace == null) {
			return;
		}
		ctxSpace.clear(span, range);
	}
Clear the register context in the given box

@param span the lifespan of the box
@param range the address range of the box
Ghidra/Debug/Framework-TraceModeling/src/main/java/ghidra/trace/database/listing/AbstractBaseDBTraceDefinedUnitsView.java