Cf_data_render.AffixA submodule containing affix operators the provide a convenient and idiosyncratic syntax for composing record and structure models.
Use m $: f as an abbreviation of Element.required m f.
Use m $? f as an abbreviation of Element.optional m f.
Use m $= v as an abbreviation of Element.constant m v.
Use m %: f as an abbreviation of Field.required m f.
Use m %? f as an abbreviation of Field.optional m f.
Use m %= v as an abbreviation of Field.constant m v.