@Override
		public void apply(Program program, Address addr, Match match) {
			if (!checkPreRequisites(program, addr)) {
				return;
			}
			applyActionToSet(program, addr, potentialFuncResult, match);
		}
Get an existing function right above the addr.
@param program program to check
@param addr address to check
@return true if there is an existing function above addr
Ghidra/Features/BytePatterns/src/main/java/ghidra/app/analyzers/FunctionStartAnalyzer.java