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. 
class com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate$1 implements com.google.common.base.Supplier<java.lang.String>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate$1
  super_class: java.lang.Object
{
  final com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate this$1;
    descriptor: Lcom/google/common/util/concurrent/AbstractScheduledService$ServiceDelegate;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate);
    descriptor: (Lcom/google/common/util/concurrent/AbstractScheduledService$ServiceDelegate;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate$1 this
         0: .line 218
            aload 0 /* this */
            aload 1
            putfield com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate$1.this$1:Lcom/google/common/util/concurrent/AbstractScheduledService$ServiceDelegate;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/util/concurrent/AbstractScheduledService$ServiceDelegate$1;
    MethodParameters:
        Name  Flags
      this$0  final

  public java.lang.String get();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate$1 this
         0: .line 221
            new java.lang.StringBuilder
            dup
            aload 0 /* this */
            getfield com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate$1.this$1:Lcom/google/common/util/concurrent/AbstractScheduledService$ServiceDelegate;
            invokestatic com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate.access$0:(Lcom/google/common/util/concurrent/AbstractScheduledService$ServiceDelegate;)Lcom/google/common/util/concurrent/AbstractScheduledService;
            invokevirtual com.google.common.util.concurrent.AbstractScheduledService.serviceName:()Ljava/lang/String;
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc " "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 0 /* this */
            getfield com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate$1.this$1:Lcom/google/common/util/concurrent/AbstractScheduledService$ServiceDelegate;
            invokevirtual com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate.state:()Lcom/google/common/util/concurrent/Service$State;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/util/concurrent/AbstractScheduledService$ServiceDelegate$1;

  public java.lang.Object get();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate$1.get:()Ljava/lang/String;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Lcom/google/common/base/Supplier<Ljava/lang/String;>;
SourceFile: "AbstractScheduledService.java"
EnclosingMethod: com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate.doStart:()V
NestHost: com.google.common.util.concurrent.AbstractScheduledService
InnerClasses:
  private final ServiceDelegate = com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate of com.google.common.util.concurrent.AbstractScheduledService
  com.google.common.util.concurrent.AbstractScheduledService$ServiceDelegate$1
  public abstract State = com.google.common.util.concurrent.Service$State of com.google.common.util.concurrent.Service