This test exercises change signature refactoring handling of function values.

TODO(rfindley): use a literalization strategy to allow these references.

-- go.mod --
module unused.mod

go 1.18

-- a/a.go --
package a

func A(x, unused int) int { //@codeaction("unused", "refactor.rewrite.removeUnusedParam", err=re"non-call function reference")
	return x
}

func _() {
	_ = A
}

-- b/b.go --
package b

// golang/go#80834: B passed as an argument to a method call should not be
// mistaken for a call to B.
func B(x, unused int) int { //@codeaction("unused", "refactor.rewrite.removeUnusedParam", err=re"non-call function reference")
	return x
}

type S struct{}

func (S) M(any) {}

func _() {
	var s S
	s.M(B)
}
