RandomGenerator:setState
Sets the current state of the random number generator. The value used as an argument for this function is an opaque string and should only originate from a previous call to RandomGenerator:getState in the same major version of LÖVE.

This is different from RandomGenerator:setSeed in that setState directly sets the RandomGenerator's current implementation-dependent state, whereas setSeed gives it a new seed value.
RandomGenerator:setState( state )
state string The new state of the RandomGenerator object, represented as a string. This should originate from a previous call to RandomGenerator:getState.