Op("lastIndex", indexAccum, keepSignatures=false) {
        var c = Arg(CONDITION, "condition") { description = "Condition to check on input variable" }
        Signature(this.inputs.get(0), c, this.args.get(1))                      //in, condition, dimensions - for vararg
        Signature(this.inputs.get(0), c, this.args.get(0), this.args.get(1))    //in, condition, keepDims, dimensions
        Doc(Language.ANY, DocScope.ALL){