https://github.com/google/guava/guava: Guava is a suite of core and expanded libraries that include utility classes, google's collections, io classes, and much much more. 
public final class com.google.common.net.HttpHeaders$ReferrerPolicyValues
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.google.common.net.HttpHeaders$ReferrerPolicyValues
  super_class: java.lang.Object
{
  public static final java.lang.String NO_REFERRER;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "no-referrer"

  public static final java.lang.String NO_REFFERER_WHEN_DOWNGRADE;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "no-referrer-when-downgrade"

  public static final java.lang.String SAME_ORIGIN;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "same-origin"

  public static final java.lang.String ORIGIN;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "origin"

  public static final java.lang.String STRICT_ORIGIN;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "strict-origin"

  public static final java.lang.String ORIGIN_WHEN_CROSS_ORIGIN;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "origin-when-cross-origin"

  public static final java.lang.String STRICT_ORIGIN_WHEN_CROSS_ORIGIN;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "strict-origin-when-cross-origin"

  public static final java.lang.String UNSAFE_URL;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "unsafe-url"

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.net.HttpHeaders$ReferrerPolicyValues this
         0: .line 139
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.google.common.net.HttpHeaders$ReferrerPolicyValues this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/net/HttpHeaders$ReferrerPolicyValues;
}
SourceFile: "HttpHeaders.java"
NestHost: com.google.common.net.HttpHeaders
InnerClasses:
  public final ReferrerPolicyValues = com.google.common.net.HttpHeaders$ReferrerPolicyValues of com.google.common.net.HttpHeaders