code: def signed_expm1(x: Array) -> Array:
      """Signed exponential of x - 1, inverse of signed_logp1."""
      chex.assert_type(x, float)
      return jnp.sign(x) * jnp.expm1(jnp.abs(x))
  
file_path: rlax/rlax/_src/transforms.py
imports: import chex
  import jax
  import jax.numpy
  from rlax._src import base
label_desc: Use image node_id 5 for calling a global function with example usage: signed_expm1(x) and returns: unknown