https://openjdk.java.net/ 
public interface com.sun.jmx.snmp.agent.SnmpUserDataFactory
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.jmx.snmp.agent.SnmpUserDataFactory
  super_class: java.lang.Object
{
  public abstract java.lang.Object allocateUserData(com.sun.jmx.snmp.SnmpPdu);
    descriptor: (Lcom/sun/jmx/snmp/SnmpPdu;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws com.sun.jmx.snmp.SnmpStatusException
    MethodParameters:
            Name  Flags
      requestPdu  

  public abstract void releaseUserData(java.lang.Object, com.sun.jmx.snmp.SnmpPdu);
    descriptor: (Ljava/lang/Object;Lcom/sun/jmx/snmp/SnmpPdu;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws com.sun.jmx.snmp.SnmpStatusException
    MethodParameters:
             Name  Flags
      userData     
      responsePdu  
}
SourceFile: "SnmpUserDataFactory.java"