# Added only to satisfy the Steep requirements. Not 100% reliable.
module EventEmitter
  def add_listener: (untyped `type`, ?{once: true} params) -> Integer
  alias on add_listener

  def remove_listener: (untyped id_or_type) -> Array[untyped]?
  def emit: (untyped `type`, *untyped data) -> Array[untyped]
  def once: (untyped `type`) -> Integer
end