init init_abrareassignexpr (
		n_expr: nullable AExpr,
		n_args: nullable AExprs,
		n_assign_op: nullable AAssignOp,
		n_value: nullable AExpr
	)
	do
		_n_expr = n_expr.as(not null)
		n_expr.parent = self
		_n_args = n_args.as(not null)
		n_args.parent = self
		_n_assign_op = n_assign_op.as(not null)
		n_assign_op.parent = self
		_n_value = n_value.as(not null)
		n_value.parent = self
	end