final void addFilter(Emulator emu) {
		this.emu = emu;
		nextFilter = emu.getFilteredMemState().setFilter(this);
		if (nextFilter != null) {
			nextFilter.prevFilter = this;
		}
	}
Invoked <em>after</em> a write

@param spc the space written to
@param off the offset within the space
@param size the number of bytes written
@param values the bytes written
Ghidra/Framework/Emulation/src/main/java/ghidra/app/emulator/MemoryAccessFilter.java