code: def _settingDefinition(self, setting):
      if setting.name.startswith("COMPILER_"):
          self._settings[setting.name] = setting.value
      else:
          log.warning(f"Unsupported setting ignored: {setting.name}")
  
imports: import logging
  import re
  from io import StringIO
  from fontTools.feaLib import ast
  from fontTools.ttLib import TTFont, TTLibError
  from fontTools.voltLib import ast
  from fontTools.voltLib.parser import Parser
label_desc: Use image node_id 15 for calling the VoltToFea obj's underlying member method code with example usage: obj._settingDefinition(setting) without return types