Function getInstanceHandle

sqlite-wasm-cos/sqlite3-node.mjs:9877–9883

(obj, create=true)

     public API.
  */
  const getInstanceHandle = function f(obj, create=true){
    let ii = f.map.get(obj);
    if( !ii && create ){
      f.map.set(obj, (ii=f.create(obj)));
    }
    return ii;
  };
  getInstanceHandle.map = new WeakMap;
  getInstanceHandle.create = (forObj)=>{
    return Object.assign(Object.create(null),{