ava.base/java/io/ObjectStreamConstants.html#TC_NULL" title="class or interface in java.io" class="external-link">TC_NULL</a>, <a href="https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/io/ObjectStreamConstants.html#TC_OBJECT" title="class or interface in java.io" class="external-link">TC_OBJECT</a>, <a href="https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/io/ObjectStreamConstants.html#TC_PROXYCLASSDESC" title="class or interface in java.io" class="external-link">TC_PROXYCLA