How to Remove Null Type from a Schema

const notes1 = Schema.NullOr(Schema.String), // notes1: string | null

const notes2: Schema.optionalWith(notes1, {exact: true}); // notes2?: string | null <-- want to remove null here 

const notes1 = Schema.NullOr(Schema.String), // notes1: string | null

const notes2: Schema.optionalWith(notes1, {exact: true}); // notes2?: string | null <-- want to remove null here