code: def _get_backend_name_prefix(name, backend):
      if backend is not None and not name.startswith(backend.lower()):
          name = backend.lower() + ":" + name
  
      return name
  
file_path: hls4ml/hls4ml/model/flow/flow.py
label_desc: Use image node_id 1 for calling a global function with example usage: _get_backend_name_prefix(name, backend) and returns: name