code: def __call__(self, x):
      x = self.norm(x)
      proj = self.proj(x)
  
      all_proj = jax.lax.all_gather(proj, "shard")
  
      return hk.Flatten()(jnp.transpose(all_proj, (1, 0, 2)))
  
imports: import haiku
  import jax
  import jax.numpy
  import numpy
  from einops import rearrange, repeat
  from mesh_transformer.util import f_psum, g_psum, maybe_shard, head_print
  from jax.experimental import PartitionSpec
  from jax.experimental.maps import thread_resources
label_desc: Use image node_id 2 for calling the ProjectionShard obj's underlying member method code with example usage: obj.__call__(x) and returns: hk