setIdentifier(id = '') {
        if (id.length == 0 || id == this.identifier) return;


        for (var i = 0; i < this.scope.TB_Output.length; i++) {
            this.scope.TB_Output[i].checkPairing();
        }


        for (var i = 0; i < this.scope.TB_Output.length; i++) {
            if (this.scope.TB_Output[i].identifier == this.identifier) { this.scope.TB_Output[i].identifier = id; }
        }

        this.identifier = id;

        this.checkPaired();
    }
This function is used to set a uniq identifier to every testbench
@memberof TB_Input