code: def cat(tensors, *args, **kwargs):
      """Perform tensor concatenation"""
      return __cat_stack_helper("cat", tensors, *args, **kwargs)
  
imports: import torch
  from ..tensor_types import is_tensor
  from ..util import torch_cat, torch_stack
label_desc: Use image node_id 15 for calling a global function with example usage: cat(tensors) and returns: __cat_stack_helper