ZodClass.nullish() is missing

[sam-goodwin]

Ran into sub-type errors, (ZodClass is not compatible with ZodType), when trying to add the nullish() method.

node_modules/.pnpm/file+..+.._zod@3.22.4/node_modules/zod-class/lib/cjs/index.d.ts:6:18 - error TS2430: Interface 'ZodClass<Members, Instance, Shape>' incorrectly extends interface 'ZodType<Instance, ZodTypeDef, Instance>'.
  The types of 'nullish().unwrap()._def.typeName' are incompatible between these types.
    Type 'ZodFirstPartyTypeKind.ZodOptional' is not assignable to type 'ZodFirstPartyTypeKind.ZodNullable'.

6 export interface ZodClass<Members = any, Instance = any, Shape extends ZodRawShape = ZodRawShape> extends ZodType<Instance> {

For now, have omitted it. Can always be worked around with User.schema().nullish()