code: def _isense_builtin_symbol(symbol):
      
      if "builtin" in config.isense and "uppercase" in config.isense["builtin"]:
          if config.isense["builtin"]["uppercase"] == "true":
              return symbol.upper()
          else:
              return symbol.lower()
      else:
          #Make it lowercase by default
          return symbol.lower()
docs: Returns the symbol with modifications according to settings in the
      <isense> configuration section.