public FunctionDescription findFunction(String fname, long address, ExecutableRecord exe)
			throws LSHException {
		FunctionDescription fdesc = new FunctionDescription(exe, fname, address);

		FunctionDescription res = funcrec.floor(fdesc);
		if (res == null || (!res.equals(fdesc))) {
			throw new LSHException("Unable to find FunctionDescription");
		}
		return res;
	}
Find a function (within an executable) by its name and address (both must be provided)
If the request function does not exist, an exception is thrown
@param fname - the name of the function
@param address - the address of the function
@param exe - the ExecutableRecord containing the function
@return the FunctionDescription
@throws LSHException if a matching function does not exist
Ghidra/Features/BSim/src/main/java/ghidra/features/bsim/query/description/DescriptionManager.java