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. 
final class com.google.common.io.CharSource$EmptyCharSource extends com.google.common.io.CharSource$StringCharSource
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.io.CharSource$EmptyCharSource
  super_class: com.google.common.io.CharSource$StringCharSource
{
  private static final com.google.common.io.CharSource$EmptyCharSource INSTANCE;
    descriptor: Lcom/google/common/io/CharSource$EmptyCharSource;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 661
            new com.google.common.io.CharSource$EmptyCharSource
            dup
            invokespecial com.google.common.io.CharSource$EmptyCharSource.<init>:()V
            putstatic com.google.common.io.CharSource$EmptyCharSource.INSTANCE:Lcom/google/common/io/CharSource$EmptyCharSource;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.io.CharSource$EmptyCharSource this
         0: .line 664
            aload 0 /* this */
            ldc ""
            invokespecial com.google.common.io.CharSource$StringCharSource.<init>:(Ljava/lang/String;)V
         1: .line 665
            return
        end local 0 // com.google.common.io.CharSource$EmptyCharSource this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/google/common/io/CharSource$EmptyCharSource;

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.io.CharSource$EmptyCharSource this
         0: .line 669
            ldc "CharSource.empty()"
            areturn
        end local 0 // com.google.common.io.CharSource$EmptyCharSource this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/io/CharSource$EmptyCharSource;
}
SourceFile: "CharSource.java"
NestHost: com.google.common.io.CharSource
InnerClasses:
  private final EmptyCharSource = com.google.common.io.CharSource$EmptyCharSource of com.google.common.io.CharSource
  private StringCharSource = com.google.common.io.CharSource$StringCharSource of com.google.common.io.CharSource