I have the following code in my GenServer:

def init(%State{} = state), do: {:ok, state, 1_000}
def init(opts \\ []) do
  state = struct(State, opts)
  {:ok, state, 1_000}
end

This code, as some of you may guess will generate the following warning:

definitions with multiple clauses and default values require a header. Instead of:

def foo(:first_clause, b \\ :default) do ... end
def foo(:second_clause, b) do ... end

one should write:

def foo(a, b \\ :default)
def foo(:first_clause, b) do ... end
def foo(:second_clause, b) do ... end

def init/1 has multiple clauses and defines defaults in one or more clauses

The warning is pretty good, but I don’t see how I can apply it. Mainly because init can be called in 3 completely different ways:

1. passing a state
2. with no arguments
3. passing an options keyword list

How can I fix this?