Function refusals 

pub fn refusals(
    spec: &ModelSpec,
    tensors: &[(String, GgmlType)],
) -> Vec<Refusal>

Every gap between the checkpoint and the engine: spec_refusals, and when there are none, the frequency factors a rotation scaled by them turns by (rope_freqs.weight, written into its rotary tables) when tensors (the checkpoint’s directory, name and format) lacks them, and each tensor the program reads that tensors lacks or stores in a format no unit reads.