constructor(size = 32) {
			super();
			/**
			 * The number of valid bytes in the buffer.
			 */
			this.count = 0;
			if (size < 0) {
				throw new IllegalArgumentException('Negative initial size: '
					+ size);
			}
			this.buf = new Uint8Array(size);
		}
Creates a new byte array output stream, with a buffer capacity of
the specified size, in bytes.

@param   size   the initial size.
@exception  IllegalArgumentException if size is negative.