is there a way to check if a oredict is emty or contains something?
Example

val test = oreDict[ingotIron];

if test.size >= 1 
{
     Do stuff...
}

Actually, that's a lot easier:

test.empty

Returns true if the ODE is empty, and false if it is not.

It can be found in the corresponding wiki page:
https://docs.blamejared.com/1.12//en/#Vanilla/OreDict/IOreDictEntry/#zengetters