Convert a scarlet lite blend into a persistable data object
- Parameters:
 
- blend
scarlet.lite.LiteBlend The blend that is being persisted.
 
- psfCenter
tuple of int The center of the PSF.
 
- xy0
tuple of int The lower coordinate of the entire blend.
 
 
- Returns:
 
- blendData
ScarletBlendDataModel The data model for a single blend.