634       const kvvfsStorage = (zClass)=>  argument
635             ((115/*=='s'*/===wasm.getMemValue(zClass))
645         xRead: (zClass, zKey, zBuf, nBuf)=>{  argument
649             const zXKey = kvvfsMakeKey(zClass,zKey);
652             const jV = kvvfsStorage(zClass).getItem(jKey);
675         xWrite: (zClass, zKey, zData)=>{  argument
678             const zXKey = kvvfsMakeKey(zClass,zKey);
681             kvvfsStorage(zClass).setItem(jKey, wasm.cstringToJs(zData));
690         xDelete: (zClass, zKey)=>{  argument
693             const zXKey = kvvfsMakeKey(zClass,zKey);
695             kvvfsStorage(zClass).removeItem(wasm.cstringToJs(zXKey));