public boolean isExternalSpace(int spaceID) {
		return spaceID == AddressSpace.EXTERNAL_SPACE.getSpaceID();
	}
Check if the space ID is an external space.

External spaces are single locations that have no size
normally associated with a location in another program.

@param spaceID the ID of the space
@return true if is a symbolic space
Ghidra/Features/Base/src/main/java/ghidra/program/util/VarnodeContext.java