@type t() :: %Phoenix.SocketClient.Channel.State{
  caller: pid() | nil,
  hooks: map(),
  join_ref: String.t() | nil,
  join_start_time: term(),
  leave_start_time: term(),
  params: map(),
  pushes: list(),
  registry_name: atom(),
  socket_pid: pid(),
  sup_pid: pid(),
  topic: String.t()
}