public int numMatchedInstructionsInFirst() {
		return srcStore.numMatchedInstructions();
	}
Determines the number of instructions from the first function that match an instruction
in the second function.
@return the number of instructions in the first function that have matches.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/correlate/HashedFunctionAddressCorrelation.java