private void setDefaultDataSpace(String spaceName) {
		if (spaceName == null) {
			return;
		}

		AddressSpace addressSpace = addressFactory.getAddressSpace(spaceName);
		if (addressSpace == null || !addressSpace.isLoadedMemorySpace()) {
			Msg.error(this,
				"unknown/invalid BSS space " + spaceName + ": " + description.getSpecFile());
			return;
		}
		defaultDataSpace = addressSpace;
		defaultPointerWordSize = defaultDataSpace.getAddressableUnitSize();
	}
Returns the source file indexer
@return indexer
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/app/plugin/processors/sleigh/SleighLanguage.java