https://tomcat.apache.org/: Tomcat Servlet Engine Core Classes and Standard implementations 
public interface org.apache.catalina.startup.UserDatabase
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.apache.catalina.startup.UserDatabase
  super_class: java.lang.Object
{
  public abstract org.apache.catalina.startup.UserConfig getUserConfig();
    descriptor: ()Lorg/apache/catalina/startup/UserConfig;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract void setUserConfig(org.apache.catalina.startup.UserConfig);
    descriptor: (Lorg/apache/catalina/startup/UserConfig;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
            Name  Flags
      userConfig  

  public abstract java.lang.String getHome(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      user  

  public abstract java.util.Enumeration<java.lang.String> getUsers();
    descriptor: ()Ljava/util/Enumeration;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/Enumeration<Ljava/lang/String;>;
}
SourceFile: "UserDatabase.java"