android - 比较内置的`setOf`和Android的`keySet`？

Question

试图在我的应用程序中简洁地确保一致性。如何检查捆绑包是否具有与集合相同的键？- 或者我如何构建一个keySet简洁的比较？

import android.os.Bundle


fun main() {
    val expect = setOf("alpha", "beta")
    val bundle = Bundle()
    bundle.putCharSequence("alpha", "gamma")
    bundle.putCharSequence("beta", "zeta")
    assert(bundle.keySet() == expect)
    // Also tried `bundle.keySet().equals(expect)`
}

输出println("Expected $expect got $keys")：

Expected [alpha, beta] got android.util.MapCollections$KeySet@48d26086