init init_abraexprs (
		n_obra: nullable TObra,
		n_exprs: Collection[Object], # Should be Collection[AExpr]
		n_cbra: nullable TCbra
	)
	do
		_n_obra = n_obra.as(not null)
		n_obra.parent = self
		self.n_exprs.unsafe_add_all(n_exprs)
		_n_cbra = n_cbra.as(not null)
		n_cbra.parent = self
	end