function createStream2() {
		return new RandomStream( r, p, opts );
	}
Returns a readable stream for generating pseudorandom numbers drawn from a negative binomial distribution.

@private
@throws {TypeError} `r` must be a positive number
@throws {TypeError} `p` must be a probability
@throws {TypeError} options argument must be an object
@throws {TypeError} must provide valid options
@throws {Error} must provide a valid state
@returns {RandomStream} Stream instance