@NonNull
	@Override
	public String toString() {
		if (size() == 0)
			return "";

		final char[] out = new char[mValue.length * 3 - 1];
		for (int j = 0; j < mValue.length; j++) {
			int v = mValue[j] & 0xFF;
			out[j * 3] = HEX_ARRAY[v >>> 4];
			out[j * 3 + 1] = HEX_ARRAY[v & 0x0F];
			if (j != mValue.length - 1)
				out[j * 3 + 2] = '-';
		}
		return "(0x) " + new String(out);
	}
Returns the size of underlying byte array.

@return Length of the data.
ble/src/main/java/no/nordicsemi/android/ble/data/Data.java