def log1(x)
end
def log2(x)
end
def log3(x)
end

log2(1.step(5) {|n| log1(n) })
log3(1.step(5))

__END__
# Classes
class Object
  private
  def log1: (Integer | Numeric x) -> nil
  def log2: (void x) -> nil
  def log3: (Enumerator[Integer | Numeric] x) -> nil
end