SN Realization API

How might one want to use a function or class that "realizes" a set of SNe? By this, I mean that it returns a collection of SNe, where each SN consists of the position, time and parameters/model that fully describe it. The inputs are generally:

• SN model or name thereof
• distribution of model parameters (could be dependent on redshift, host galaxy properties)
• how to determine when the SNe occur (Examples: the volumetric rate vs z, or by host mass for example).
• how to determine where the SNe occur (Examples: random location, proportional to galaxy stellar mass distribution)
• The area on the sky over which to generate the sample
• The redshift range over which to generate the sample

A realizer might need to know about galaxy properties in order to generate the sample. For example, in order to determine how often they occur, exactly where they occur, and even the model parameters. On the other hand, a simple realizer might scatter SNe randomly on the sky (in cases where we don't care about hosts).