_compileNodeVM() {
		let script = this._compiledNodeVM;
		if (!script) {
			this._compiledNodeVM = script = this._compile(MODULE_PREFIX, MODULE_SUFFIX);
		}
		return script;
	}
Will return the cached version of the script intended for NodeVM or compile it.

@private
@return {vm.Script} The compiled script
@throws {SyntaxError} If there is a syntax error in the script.