1D sampler, abstract base class for Sampler like Sampler1DUnif, Sampler1DRfun, Sampler1DCateg and Sampler1DNormal.
Returns the one Parameter that is sampled from.
Creates a new instance of this R6 class.
Note that this object is typically constructed via derived classes, e.g., Sampler1DUnif.
Domain / support of the distribution we want to sample from.