mb.appendCallVirtual("java.lang.Object.getClass",
"()Ljava/lang/Class;");
mb.appendCallVirtual("java.lang.Class.getName", "()Ljava/lang/String;");
mb.appendCallVirtual("java.lang.StringBuffer.append",
"(Ljava/lang/String;)Ljava/lang/StringBuffer;");
mb.appendDUP();
mb.appendLoadConstant(" must extend abstract mapping for " +
"type " + m_class.getClassName());
mb.appendCallVirtual("java.lang.StringBuffer.append",
"(Ljava/lang/String;)Ljava/lang/StringBuffer;");
mb.appendCallVirtual("java.lang.StringBuffer.toString",