code: def prevbefore_jvp(primals, tangents):
      (x,) = primals
      (tx,) = tangents
      return prevbefore(x), tx
  
imports: import jax
  import jax.numpy
  from jaxtyping import Array
label_desc: Use image node_id 4 for calling a global function with example usage: prevbefore_jvp(primals, tangents) and returns: prevbefore,  tx