code: def _print_Symbol(self, expr):
      name = super()._print_Symbol(expr)
      return self._symbol_to_array(name)
  
imports: import re
  from sympy.core import S
  from sympy.core.numbers import Integer
  from sympy.printing.cxx import CXX11CodePrinter
  from hls4ml.backends.template import FunctionCallTemplate, LayerConfigTemplate
  from hls4ml.model.layers import SymbolicExpression
label_desc: Use image node_id 9 for calling the HLSCodePrinter obj's underlying member method code with example usage: obj._print_Symbol(expr) and returns: self