Reports unused expressions, which often indicate incomplete code or a missing return statement.

If the unused expression is the last statement in a function and its type matches the function's return type, a quick fix is available to automatically add the return keyword.

示例：


fun example(): Int {
    val x = 10
    x // Warning: Expression is unused
}

在应用快速修复后：


fun example(): Int {
    val x = 10
    return x
}