@Override
	public String toString() {
		StringBuffer buf = new StringBuffer();
		writeBits(buf);
		return buf.toString();
	}
Get number of bits that are ditted (don't care)

@return number of ditted bits (don't care)
Ghidra/Features/Base/src/main/java/ghidra/util/bytesearch/DittedBitSequence.java