code: def test_18934_empty_leaky_relu():
      arr = np.random.rand(0, 2)
      arr_grad = np.empty_like(arr)
  
      autograd.mark_variables([arr], [arr_grad])
      with autograd.record():
          res = npx.leaky_relu(arr)
      res.backward()
  
imports: from mxnet import np, npx, use_np, autograd, initializer, gluon
  from common import with_environment
  import pytest
label_desc: Use image node_id 4 for calling a global function with example usage: test_18934_empty_leaky_relu() without return types