code: def format(self, node):
      params = self._default_config_params(node)
      params["n_elem"] = node.get_input_variable(
          node.inputs[0]
      ).size_cpp()
  
      return self.template.format(**params)
  
file_path: hls4ml/hls4ml/backends/quartus/passes/merge_templates.py
imports: from hls4ml.backends.backend import get_backend
  from hls4ml.backends.template import FunctionCallTemplate, LayerConfigTemplate
  from hls4ml.model.layers import Concatenate, Dot, Merge
label_desc: Use image node_id 2 for calling the MergeConfigTemplate obj's underlying member method code with example usage: obj.format(node) and returns: self