public double getSignificance() {
		return note.getSignificance();
	}
The significance of the similarity of this function to the input function.  This is a value
that starts at 0.0, with no upper bound.  Functions small in size will have a low 
significance score, as there is a chance that many small functions will have a 
similar makeup.

@return the significance of the similarity of this function to the input function.
Ghidra/Features/BSim/src/main/java/ghidra/features/bsim/gui/search/results/BSimMatchResult.java