discriminated unionをomitする

code:ts

type X = Omit<

{ type: 'a'; date: 'date'; a: 4 } | { type: 'b'; date: 'date'; b: 55 },

'date'

;

code:ts

type RemoveNameField<Type> = {

};

code:ts

type OmitUnion<T, K extends keyof any> = T extends any ? Omit<T, K> : never

たぶんpickも同様？