public boolean getSuperiorFullRelation(FunctionRecord superiorFunction,
			FidHashQuad inferiorFunction) {
		try {
			DBRecord libraryByID = librariesTable.getLibraryByID(superiorFunction.getLibraryID());
			if (libraryByID != null) {
				return relationsTable.getSuperiorFullRelation(superiorFunction, inferiorFunction);
			}
		}
		catch (IOException e) {
			Msg.error(this, "Serious problem in getSuperiorFullRelation", e);
		}
		return false;
	}
Returns true if the relation exists, between a superior (caller) function and a
full hash representing the inferior (callee) function.
@param superiorFunction the caller function
@param inferiorFunction a hash representing the callee function
@return true if the relation exists
Ghidra/Features/FunctionID/src/main/java/ghidra/feature/fid/db/FidDB.java