code: def interpret_sigmoid_expr(self, expr, **kwargs):
      self.with_sigmoid_expr = True
      return super().interpret_sigmoid_expr(expr, **kwargs)
  
file_path: m2cgen/m2cgen/interpreters/ruby/interpreter.py
imports: from pathlib import Path
  from m2cgen.ast import BinNumOpType
  from m2cgen.interpreters.interpreter import ImperativeToCodeInterpreter
  from m2cgen.interpreters.mixins import LinearAlgebraMixin, PowExprInfixMixin
  from m2cgen.interpreters.ruby.code_generator import RubyCodeGenerator
  from m2cgen.interpreters.utils import get_file_content
label_desc: Use image node_id 7 for calling the RubyInterpreter obj's underlying member method code with example usage: obj.interpret_sigmoid_expr(expr) and returns: super