></h3><ul class="tsd-signatures"><li class="tsd-description"><div class="tsd-comment tsd-typography"><p>Gets or sets a random number generator.
The default value is Math, which results in calling Math.random().
Change this to null in order to use an instance of an internal repeatable pseudo-random number generator,
which will become the new value of this property.</p>
<p>The new value must be either null or an Object with a method named &quot;random&quot; taking zero arguments
and returning a random number 