def log1(x)
end
def log2(x)
end

def foo
  x = nil
  1.times do |_|
    x = 1
    log1(x)
  end
  x
end

def test_yield
  yield
end

def bar
  x = nil
  test_yield do
    x = 1
    log2(x)
  end
  x
end

foo
bar

__END__
# Classes
class Object
  private
  def log1: (Integer? x) -> nil
  def log2: (Integer? x) -> nil
  def foo: -> Integer?
  def test_yield: { -> nil } -> nil
  def bar: -> Integer?
end