code: def __init__(self, name):
      self.name = name
      self.custom_source = {}
      self._init_optimizers()
  
imports: import inspect
  import os
  from pathlib import Path
  from hls4ml.backends.template import Template
  from hls4ml.model.flow import get_backend_flows, update_flow
  from hls4ml.model.optimizer import LayerOptimizerPass, extract_optimizers_from_object, extract_optimizers_from_path, get_backend_passes, get_optimizer, register_pass
label_desc: Use image node_id 1 to create a new Backend object  with example: obj = Backend(name)