public List<Instruction> getUnmatchedInstructionsInSecond() {
		return destStore.getUnmatchedInstructions();
	}
Determines the number of instructions from the second function that do not match an 
instruction in the first function.
@return the number of instructions in the second function without matches.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/correlate/HashedFunctionAddressCorrelation.java