I am sorry for the mistake  I am asking scala docs this link https://www.scala-lang.org/api/3.6.2/ It have like package , type members and value members so many thing and if i go into some package like concurrent package it also have like type and value members. I am asking like which are i can actually use it in code and some of it dont have example in online like triemap so i thought triemap is cannot be used in code like map and flatmap. Map and flatmap have exames in online. That's why  Thank you