Function move_resources 

pub fn move_resources<R>(
    host: &mut dyn ServerHost,
    from: &Capability<dyn ResourceHandler<R>>,
    to: &Capability<dyn ResourceHandler<R>>,
    filter: impl Fn(&R) -> bool,
    max: u32,
    tx: &Transaction,
) -> Result<u32, Overanswered>

Moves up to max of what filter accepts out of from into wherever to takes it, index by index from 0 (NeoForge’s ResourceHandlerUtil.move), in transaction tx: how much moved. Each move is all or nothing, in a transaction of its own: what to won’t take stays in from, and a move to takes only part of is tried again with that part (a cauldron gives whole thirds). A handler answering more than it was asked has its move undone and ends the moving with Overanswered.