var u=function(){var o=function(t,n){o=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(r,e){r.__proto__=e}||function(r,e){for(var i in e)if(Object.prototype.hasOwnProperty.call(e,i))r[i]=e[i]};return o(t,n)};return function(t,n){if(typeof n!=="function"&&n!==null)throw new TypeError("Class extends value "+String(n)+" is not a constructor or null");o(t,n);function r(){this.constructor=t}t.prototype=n===null?Object.create(n):(r.prototype=n.prototype,new r)}}();import{UpdateCommand as c}from"../AbstractCommand";var f=function(o){u(t,o);function t(){return o!==null&&o.apply(this,arguments)||this}Object.defineProperty(t.prototype,"operator",{get:function(){return"$pop"},enumerable:false,configurable:true});t.prototype.stringify=function(){return-1};return t}(c);export{f as ShiftCommand};