function isArrowFunction( value ) {
	var str;
	if ( !isFunction( value ) ) {
		return false;
	}
	str = function2string( value );
	return RE_ARROW_FUNCTION.test( str );
}
Tests whether a value is an arrow function.

@param {*} value - value to test
@returns {boolean} boolean indicating whether a value is an arrow function

@example
var arrow = () => {};
var bool = isArrowFunction( arrow );
// returns true

@example
function beep() {
    return 'beep';
}

var bool = isArrowFunction( beep );
// returns false