class_docstr: This interpreter provides default implementation for the methods
  interpreting AST expression into code.
  
  It can be used for the most functional programming languages and requires
  only language-specific instance of the CodeGenerator.
  
  !!IMPORTANT!!: Code generators used by this interpreter must know nothing
  about AST.
code: def create_code_generator(self):
      raise NotImplementedError
  
imports: from m2cgen.assemblers import fallback_expressions
  from m2cgen.ast import BinNumExpr, CompExpr, IfExpr
  from m2cgen.interpreters.utils import CachedResult, _get_handler_name
label_desc: Use image node_id 3 for calling the FunctionalToCodeInterpreter obj's underlying member method code with example usage: obj.create_code_generator() without return types