function factory( value, options ) {
	var nargs;
	var opts;
	var fcn;
	var FLG;

	nargs = arguments.length;
	if ( nargs === 0 ) {
		opts = {};
		FLG = true;
	} else if ( nargs === 1 ) {
		// Check (imperfectly!) whether we were provided an "options" object...
		if (
			value !== null &&
			typeof value === 'object' &&
			(
				hasOwnProp( value, 'sep' ) ||
				hasOwnProp( value, 'iter' ) ||
				hasOwnProp( value, 'objectMode' ) ||
				hasOwnProp( value, 'encoding' ) ||
				hasOwnProp( value, 'highWaterMark' )
			)
		) {
			opts = assign( {}, value );
			FLG = true;
		} else {
			opts = {};
		}
	} else { // nargs > 1
		if ( !isObject( options ) ) {
			throw new TypeError( format( 'invalid argument. Options argument must be an object. Value: `%s`.', options ) );
		}
		opts = assign( {}, options );
	}
	if ( FLG ) {
		fcn = createStream1;
	} else {
		fcn = createStream2;
	}
	return fcn;

	/**
	* Returns a readable stream which always streams the same value.
	*
	* @private
	* @param {(string|Buffer|Uint8Array|*)} value - value to stream
	* @throws {TypeError} in binary mode, value to stream must be a string, Buffer, or Uint8Array
	* @throws {TypeError} options argument must be an object
	* @throws {TypeError} must provide valid options
	* @returns {ConstantStream} Stream instance
	*/
	function createStream1( value ) {
		return new ConstantStream( value, opts );
	}

	/**
	* Returns a readable stream which always streams the same value.
	*
	* @private
	* @throws {TypeError} in binary mode, value to stream must be a string, Buffer, or Uint8Array
	* @throws {TypeError} options argument must be an object
	* @throws {TypeError} must provide valid options
	* @returns {ConstantStream} Stream instance
	*/
	function createStream2() {
		return new ConstantStream( value, opts );
	}
}
Returns a function for creating readable streams which always stream the same value.

@param {(string|Buffer|Uint8Array|*)} [value] - value to stream
@param {Options} [options] - stream options
@param {boolean} [options.objectMode=false] - specifies whether a stream should operate in object mode
@param {(string|null)} [options.encoding=null] - specifies how `Buffer` objects should be decoded to `strings`
@param {NonNegativeNumber} [options.highWaterMark] - specifies the maximum number of bytes to store in an internal buffer before pausing streaming
@param {string} [options.sep='\n'] - separator used to join streamed data
@param {NonNegativeInteger} [options.iter] - number of iterations
@throws {TypeError} options argument must be an object
@returns {Function} stream factory

@example
var opts = {
    'sep': ',',
    'objectMode': false,
    'encoding': 'utf8',
    'highWaterMark': 64
};

var createStream = factory( opts );

// Create 10 identically configured streams...
var streams = [];
var i;
for ( i = 0; i < 10; i++ ) {
    streams.push( createStream( i.toString() ) );
}