private FunctionTag getTag(Long id, Program program) throws IOException {
		FunctionManagerDB functionManagerDB = (FunctionManagerDB) program.getFunctionManager();
		return functionManagerDB.getFunctionTagManager().getFunctionTag(id);
	}
Returns the {@link FunctionTag} for the given tag id.

@param id the tag id
@param program the program version 
@return null function tag, or null if not found
@throws IOException
Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/FunctionTagMerger.java