init init_asignature (
		n_opar: nullable TOpar,
		n_params: Collection[Object], # Should be Collection[AParam]
		n_cpar: nullable TCpar,
		n_type: nullable AType
	)
	do
		_n_opar = n_opar
		if n_opar != null then n_opar.parent = self
		self.n_params.unsafe_add_all(n_params)
		_n_cpar = n_cpar
		if n_cpar != null then n_cpar.parent = self
		_n_type = n_type
		if n_type != null then n_type.parent = self
	end