Union of enums: zod enum has no native call signature

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export const EnumATypeSchema = z.nativeEnum(EnumAType)
export const EnumBTypeSchema = z.nativeEnum(EnumBType)

// CURRENT: BAD
export function EnumUnionTypeSchema() {
  return z.union([
    EnumATypeSchema(),
    EnumBTypeSchema(),
  ])
}

// SHOULD BE
export function EnumUnionTypeSchema() {
  return z.union([
    EnumATypeSchema,
    EnumBTypeSchema,
  ])
}