{"ast_node_type":"variable","tokens":[{"end":79,"kind":"keyword","start":0,"text":"add_keyword(\"while"}]}
                    add_keyword("while let", "while let $1 = $2 {\n    $0\n}");
                    add_keyword("while", "while $1 {\n    $0\n}");
                    add_keyword("loop", "loop {\n    $0\n}");