I have been trying my hardest to find the method to detect if the player is on the ground. I looked it up and people just say it like onGround always works, or isOnGround always works. Nothing shows up for me and the wording is red. I tried looking up an import but it doesn't seem to exist. I had to same issue with hasGlint, which turned out to be in the Item class and was isFoil instead. I even found the checkfalldamage method in the Living Entity class (I found this through looking at isFall