http://github.com/google/tink: Tink is a small cryptographic library that provides a safe, simple, agile and fast way to accomplish some common cryptographic tasks. 
interface com.google.crypto.tink.Registry$KeyDeriverContainer
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.google.crypto.tink.Registry$KeyDeriverContainer
  super_class: java.lang.Object
{
  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=0, args_size=0
         0: .line 19
            new java.lang.Error
            dup
            ldc "Unresolved compilation problems: \n\tThe import com.google.crypto.tink.proto cannot be resolved\n\tThe import com.google.crypto.tink.proto cannot be resolved\n\tThe import com.google.crypto.tink.proto cannot be resolved\n\tThe import com.google.crypto.tink.proto cannot be resolved\n\tKeyData cannot be resolved to a type\n\tKeyData cannot be resolved to a type\n\tKeyData cannot be resolved to a type\n\tKeyData cannot be resolved\n\tThe method keyMaterialType() from the type KeyTypeManager<KeyProtoT> refers to the missing type KeyMaterialType\n\tKeyData cannot be resolved to a type\n\tcom.google.crypto.tink.proto cannot be resolved to a type\n\tKeyData cannot be resolved to a type\n\tThe method getProto() from the type KeyTemplate refers to the missing type KeyTemplate\n\tThe method newKey(ByteString) in the type KeyManager<capture#56-of ?> is not applicable for the arguments (byte[])\n\tKeyData cannot be resolved to a type\n\tThe method deriveKey(ByteString, InputStream) from the type Registry.KeyDeriverContainer refers to the missing type KeyData\n\tKeyData cannot be resolved to a type\n\tThe method getPublicKeyData(ByteString) from the type PrivateKeyManager refers to the missing type KeyData\n\tKeyData cannot be resolved to a type\n\tKeyData cannot be resolved to a type\n\tThe method getKeyset() from the type KeysetHandle refers to the missing type Keyset\n\tKeyset cannot be resolved to a type\n\tThe method getKeyset() from the type KeysetHandle refers to the missing type Keyset\n\tKeyStatusType cannot be resolved to a variable\n\tThe method getKeyset() from the type KeysetHandle refers to the missing type Keyset\n\tKeyData cannot be resolved to a type\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public abstract KeyData deriveKey(com.google.protobuf.ByteString, java.io.InputStream);
    descriptor: (Lcom/google/protobuf/ByteString;Ljava/io/InputStream;)LKeyData;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.security.GeneralSecurityException
    MethodParameters:
                     Name  Flags
      serializedKeyFormat  
      stream               
}
SourceFile: "Registry.java"
NestHost: com.google.crypto.tink.Registry
InnerClasses:
  private abstract KeyDeriverContainer = com.google.crypto.tink.Registry$KeyDeriverContainer of com.google.crypto.tink.Registry