How to use function getRankData?

This function will check whether the rank you enter is in the data or not

Example:
if(empty($this->rankProvider->getRankData("Admin"))){
   echo "Rank Admin not exists in data!";
}else{
   echo "Rank Admin exists in data!";
}

And that's it, this function was created for you to make plugins like RankShop, And it often comes with the giveRank or removeRank!

Example:
if(empty($this->rankProvider->getRankData("Admin"))){
   echo "Rank Admin not exists in data!";
}else{
   $this->rankProvider->giveRank("ClickedTran", "Admin");
   //Something....
}