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import { MergeType } from 'mongoose';import { expectType } from 'tsd';
type A = { a: string, c: number };type B = { a: number, b: string };
expectType<string>({} as MergeType<B, A>['a']);expectType<string>({} as MergeType<B, A>['b']);expectType<number>({} as MergeType<B, A>['c']);
expectType<number>({} as MergeType<A, B>['a']);expectType<string>({} as MergeType<A, B>['b']);expectType<number>({} as MergeType<A, B>['c']);