Kotlin 属性访问语法如何适用于 Java 类(即 EditText setText)

I'm trying to switch my Android project to Kotlin. I have an EditText (a subclass of TextView) for which I want to set a hint and text programmatically. The hint works as expected. For text, though, I'm getting a type mismatch exception if I try to do it using Kotlin setter syntax:

    val test = EditText(context)

    test.setHint("hint")    // Lint message: "Use property access syntax"
    test.hint = "hint"      // ok

    test.setText("text")    // ok (no lint message)
    test.text = "text"      // Type mismatch: inferred type is kotlin.String but android.text.Editable! was expected

If we look at the declaration, we'll find identical signatures inherited from TextView:

    public final void setHint(CharSequence hint)

    public final void setText(CharSequence text)

我有一个印象，x.y = z是x.setY(z)的捷径，但显然这个印象是错误的.setText()被视为一个普通的方法，而不是setter，但是这两个方法之间的区别是什么，使得编译器的行为不同呢？我能想到的唯一一个是TextView有mHint个属性，但我不认为可能是这样.

Another thing I don't quite understand is, where does android.text.Editable come from? There is no corresponding setText(Editable) method, nor is there a public field of this type.