<Unexpected implicit cast to TextView&gt;: layout ...

# stackoverflow

[user]

Unexpected implicit cast to TextView&gt;: layout tag was TextView
I have a function that accepts a Map:
private fun chooseActiveElement(m: Map) {}

This code works:
chooseActiveElement(mapOf(
1 to (findViewById(R.id.labelFixNo))
))

But this one (parentheses removed) does not:
chooseActiveElement(mapOf(
1 to findViewById(R.id.labelFixNo)
))


Unexpected implicit cast to TextView>: layout tag was TextView

I'm curious, why are the parentheses necessary and what does the error message mean exactly?