如何调用原生的foldCode方法？ about codemirror-editor-vue3 HOT 3 CLOSED

<template>
  <Codemirror
    v-model:value="code"
    :options="cmOptions"
    border
    :height="200"
    @ready="onReady"
  />
</template>

<script lang="ts">
import { ref } from "vue";
import Codemirror from "codemirror-editor-vue3";

import _CodeMirror from "codemirror";
import "codemirror/mode/javascript/javascript.js";

import "codemirror/addon/fold/foldgutter.css";
import "codemirror/addon/fold/foldcode.js";
import "codemirror/addon/fold/foldgutter.js";
import "codemirror/addon/fold/brace-fold.js";
import "codemirror/addon/fold/comment-fold.js";

export default defineComponent({
  components: {
    Codemirror,
  },
  setup() {
    const cminstance = ref(null);
    const code = ref(`const obj = {
  name: "peter",
  age: 18
};
`);

    const cmOptions = {
      mode: "javascript",
      foldGutter: true,
      styleActiveLine: true,
      lineWrapping: true,
      extraKeys: {
        "Ctrl-Q": function (cm) {
          cm.foldCode(cm.getCursor());
        },
      },
      gutters: [
        "CodeMirror-linenumbers",
        "CodeMirror-foldgutter",
        "CodeMirror-lint-markers",
      ],
    };

    setTimeout(() => {
      cminstance.value.foldCode(_CodeMirror.Pos(0, 4));
    }, 3000);

    return {
      code,
      cmOptions,
      onReady(cm) {
        cminstance.value = cm;
      },
    };
  },
});
</script>

import { CodeMirror } from "codemirror-editor-vue3"