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 interface com.google.common.cache.Cache<K, V>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.google.common.cache.Cache
  super_class: java.lang.Object
{
  public abstract V getIfPresent();
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Ljava/lang/Object;)TV;
    RuntimeVisibleTypeAnnotations: 
      METHOD_RETURN
        org.checkerframework.checker.nullness.qual.Nullable()
    RuntimeInvisibleParameterAnnotations: 
      0:
        com.google.errorprone.annotations.CompatibleWith(value = "K")
    MethodParameters:
      Name  Flags
      key   

  public abstract V get(K, java.util.concurrent.Callable<? extends V>);
    descriptor: (Ljava/lang/Object;Ljava/util/concurrent/Callable;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.util.concurrent.ExecutionException
    Signature: (TK;Ljava/util/concurrent/Callable<+TV;>;)TV;
    MethodParameters:
        Name  Flags
      key     
      loader  

  public abstract com.google.common.collect.ImmutableMap<K, V> getAllPresent(java.lang.Iterable<?>);
    descriptor: (Ljava/lang/Iterable;)Lcom/google/common/collect/ImmutableMap;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Ljava/lang/Iterable<*>;)Lcom/google/common/collect/ImmutableMap<TK;TV;>;
    MethodParameters:
      Name  Flags
      keys  

  public abstract void put(K, );
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TK;TV;)V
    MethodParameters:
       Name  Flags
      key    
      value  

  public abstract void putAll(java.util.Map<? extends K, ? extends V>);
    descriptor: (Ljava/util/Map;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Ljava/util/Map<+TK;+TV;>;)V
    MethodParameters:
      Name  Flags
      m     

  public abstract void invalidate(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    RuntimeInvisibleParameterAnnotations: 
      0:
        com.google.errorprone.annotations.CompatibleWith(value = "K")
    MethodParameters:
      Name  Flags
      key   

  public abstract void invalidateAll(java.lang.Iterable<?>);
    descriptor: (Ljava/lang/Iterable;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Ljava/lang/Iterable<*>;)V
    MethodParameters:
      Name  Flags
      keys  

  public abstract void invalidateAll();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract long size();
    descriptor: ()J
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract com.google.common.cache.CacheStats stats();
    descriptor: ()Lcom/google/common/cache/CacheStats;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract java.util.concurrent.ConcurrentMap<K, V> asMap();
    descriptor: ()Ljava/util/concurrent/ConcurrentMap;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/concurrent/ConcurrentMap<TK;TV;>;

  public abstract void cleanUp();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
Signature: <K:Ljava/lang/Object;V:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "Cache.java"
    RuntimeInvisibleAnnotations: 
      com.google.common.annotations.GwtCompatible()