pub fn presented(c: Box<dyn Checkpoint>) -> Result<Box<dyn Checkpoint>>Expand description
c presented in the layout the spec’s arms read: a Qwen3-Next checkpoint in Qwen3.5’s, a Phi-3 or GLM-4 one with its
gate and up projections apart, a GLM-4.5 one with its FFN norms named ffn_norm, every other as it is.