private void init() {
   assert (m_module != null);
   m_typeMap =
       new ASNSymbolMap<ASNTypeAssignment>(
           m_fileParserPhase.getFileParserProblemReporter(), m_module, ASNTypeAssignment.class);
   m_valueMap =
       new ASNSymbolMap<ASNValueAssignment>(
           m_fileParserPhase.getFileParserProblemReporter(), m_module, ASNValueAssignment.class);
   m_macroMap =
       new ASNSymbolMap<ASNMacroDefinition>(
           m_fileParserPhase.getFileParserProblemReporter(), m_module, ASNMacroDefinition.class);
 }