public int getNumPostBits() {
		if (!(sequence instanceof Pattern)) {
			return 0;
		}
		int marked = ((Pattern) sequence).getMarkOffset();
		if (marked == 0) {
			return sequence.getNumFixedBits();
		}
		return sequence.getNumFixedBits() - sequence.getNumInitialFixedBits(marked);
	}
If the sequence corresponds to a PatternPair, return the number of postbits
@return the number of post bits
Ghidra/Features/Base/src/main/java/ghidra/util/bytesearch/Match.java