code: def mean_error_ratio(error_estimate, rtol, atol, y0, y1):
      err_tol = atol + rtol * jnp.maximum(jnp.abs(y0), jnp.abs(y1))
      err_ratio = error_estimate / err_tol.astype(error_estimate.dtype)
      return jnp.sqrt(jnp.mean(abs2(err_ratio)))
  
imports: from functools import partial
  import operator
  import jax
  import jax.numpy
  from jax._src import core
  from jax import custom_derivatives
  from jax import lax
  from jax._src.numpy.util import promote_dtypes_inexact
  from jax._src.util import safe_map, safe_zip
  from jax.flatten_util import ravel_pytree
  from jax.tree_util import tree_leaves, tree_map
  from jax._src import linear_util
label_desc: Use image node_id 8 for calling a global function with example usage: mean_error_ratio(error_estimate, rtol, atol, y0, y1) and returns: jnp