@Override
	public void advance(int displacement) throws AddressOverflowException {
		Address addr = startAddr.addNoWrap(displacement);
		setPosition(addr);
	}
Construct a new MemoryBufferImpl
@param mem memory associated with the given address
@param addr start address
@param bufSize the size of the memory buffer.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/mem/MemoryBufferImpl.java