How to construct a HolderSet? [1.19]

[SpectralGerbil]

Hello there, I'm an intermediate Java programmer making a Minecraft mod that does various things. Currently I'm trying to make an item that replicates the /locate command - in this particular case, I want the item to tell the player the coordinates of the nearest jungle temple.

However, I've ran into some confusion whilst doing the code for this. I looked at the code for the /locate command and my head is spinning a bit with some of these complications. The method I'm using to find the structure (findNearestMapStructure) requires a HolderSet argument. I've been browsing the javadocs for a good while now and I'm very confused as to how to create one of these - the vanilla code for /locate seems to pull information from a resource map to make one, but I don't need to use a resource map since I'm not accepting a structure as an argument like the command, correct? In that case how would I create a HolderSet for this purpose? Is there simply a way to construct one from a ResourceKey or something similar, so that the code points to a jungle temple structure?

Thanks for the help.