module T::Private::Methods

def self.declare_sig(mod, &blk)
  install_hooks(mod)
  if T::Private::DeclState.current.active_declaration
    T::Private::DeclState.current.active_declaration = nil
    raise "You called sig twice without declaring a method inbetween"
  end
  loc = caller_locations(2, 1).first
  T::Private::DeclState.current.active_declaration = DeclarationBlock.new(mod, loc, blk)
  nil
end