https://tomcat.apache.org/: Interface code to the native connector 
public interface org.apache.tomcat.jni.ProcErrorCallback
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.apache.tomcat.jni.ProcErrorCallback
  super_class: java.lang.Object
{
  public abstract void callback(long, int, java.lang.String);
    descriptor: (JILjava/lang/String;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
             Name  Flags
      pool         
      err          
      description  
}
SourceFile: "ProcErrorCallback.java"