@NonNull
	public WriteRequest split(@NonNull final DataSplitter splitter) {
		this.dataSplitter = splitter;
		this.progressCallback = null;
		return this;
	}
Adds a splitter that will be used to cut given data into multiple packets.
The splitter may modify each packet if necessary, i.e. add a flag indicating first packet,
continuation or the last packet.

@param splitter an implementation of a splitter.
@return The request.
@see #split()
ble/src/main/java/no/nordicsemi/android/ble/WriteRequest.java