https://openjdk.java.net/ 
public interface com.sun.jndi.ldap.pool.PoolCallback
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.jndi.ldap.pool.PoolCallback
  super_class: java.lang.Object
{
  public abstract boolean releasePooledConnection(com.sun.jndi.ldap.pool.PooledConnection);
    descriptor: (Lcom/sun/jndi/ldap/pool/PooledConnection;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      conn  

  public abstract boolean removePooledConnection(com.sun.jndi.ldap.pool.PooledConnection);
    descriptor: (Lcom/sun/jndi/ldap/pool/PooledConnection;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      conn  
}
SourceFile: "PoolCallback.java"