private void AddDefinitionsInUpperStatementList(syntax_tree_node currentNode, IEnumerable <statement> statementsToAdd)
        {
            var definitionsAdded = false;
            var ascendants       = currentNode.AscendantNodes(true).ToArray();

            // Объявление переменной в ближайшем statement_list
            for (int i = 0; i < ascendants.Length; i++)
            {
                if (ascendants[i] is statement_list statements)
                {
                    statements.InsertBefore(
                        ascendants[i - 1] as statement,
                        statementsToAdd);

                    definitionsAdded = true;
                    break;
                }
            }

            Debug.Assert(definitionsAdded, "Couldn't add definitions");
        }