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.io.ByteSource$ByteArrayByteSource extends com.google.common.io.ByteSource
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.io.ByteSource$ByteArrayByteSource
  super_class: com.google.common.io.ByteSource
{
  final byte[] bytes;
    descriptor: [B
    flags: (0x0010) ACC_FINAL

  final int offset;
    descriptor: I
    flags: (0x0010) ACC_FINAL

  final int length;
    descriptor: I
    flags: (0x0010) ACC_FINAL

  void <init>(byte[]);
    descriptor: ([B)V
    flags: (0x0000) 
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
        start local 1 // byte[] bytes
         0: .line 567
            aload 0 /* this */
            aload 1 /* bytes */
            iconst_0
            aload 1 /* bytes */
            arraylength
            invokespecial com.google.common.io.ByteSource$ByteArrayByteSource.<init>:([BII)V
         1: .line 568
            return
        end local 1 // byte[] bytes
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;
            0    2     1  bytes  [B
    MethodParameters:
       Name  Flags
      bytes  

  void <init>(byte[], int, int);
    descriptor: ([BII)V
    flags: (0x0000) 
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
        start local 1 // byte[] bytes
        start local 2 // int offset
        start local 3 // int length
         0: .line 571
            aload 0 /* this */
            invokespecial com.google.common.io.ByteSource.<init>:()V
         1: .line 572
            aload 0 /* this */
            aload 1 /* bytes */
            putfield com.google.common.io.ByteSource$ByteArrayByteSource.bytes:[B
         2: .line 573
            aload 0 /* this */
            iload 2 /* offset */
            putfield com.google.common.io.ByteSource$ByteArrayByteSource.offset:I
         3: .line 574
            aload 0 /* this */
            iload 3 /* length */
            putfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
         4: .line 575
            return
        end local 3 // int length
        end local 2 // int offset
        end local 1 // byte[] bytes
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    5     0    this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;
            0    5     1   bytes  [B
            0    5     2  offset  I
            0    5     3  length  I
    MethodParameters:
        Name  Flags
      bytes   
      offset  
      length  

  public java.io.InputStream openStream();
    descriptor: ()Ljava/io/InputStream;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
         0: .line 579
            new java.io.ByteArrayInputStream
            dup
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.bytes:[B
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.offset:I
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            invokespecial java.io.ByteArrayInputStream.<init>:([BII)V
            areturn
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;

  public java.io.InputStream openBufferedStream();
    descriptor: ()Ljava/io/InputStream;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
         0: .line 584
            aload 0 /* this */
            invokevirtual com.google.common.io.ByteSource$ByteArrayByteSource.openStream:()Ljava/io/InputStream;
            areturn
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;
    Exceptions:
      throws java.io.IOException

  public boolean isEmpty();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
         0: .line 589
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            ifne 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;

  public long size();
    descriptor: ()J
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
         0: .line 594
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            i2l
            lreturn
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;

  public com.google.common.base.Optional<java.lang.Long> sizeIfKnown();
    descriptor: ()Lcom/google/common/base/Optional;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
         0: .line 599
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            i2l
            invokestatic java.lang.Long.valueOf:(J)Ljava/lang/Long;
            invokestatic com.google.common.base.Optional.of:(Ljava/lang/Object;)Lcom/google/common/base/Optional;
            areturn
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;
    Signature: ()Lcom/google/common/base/Optional<Ljava/lang/Long;>;

  public byte[] read();
    descriptor: ()[B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
         0: .line 604
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.bytes:[B
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.offset:I
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.offset:I
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            iadd
            invokestatic java.util.Arrays.copyOfRange:([BII)[B
            areturn
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;

  public <T> T read(com.google.common.io.ByteProcessor<T>);
    descriptor: (Lcom/google/common/io/ByteProcessor;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
        start local 1 // com.google.common.io.ByteProcessor processor
         0: .line 610
            aload 1 /* processor */
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.bytes:[B
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.offset:I
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            invokeinterface com.google.common.io.ByteProcessor.processBytes:([BII)Z
            pop
         1: .line 611
            aload 1 /* processor */
            invokeinterface com.google.common.io.ByteProcessor.getResult:()Ljava/lang/Object;
            areturn
        end local 1 // com.google.common.io.ByteProcessor processor
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    2     0       this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;
            0    2     1  processor  Lcom/google/common/io/ByteProcessor<TT;>;
    Exceptions:
      throws java.io.IOException
    Signature: <T:Ljava/lang/Object;>(Lcom/google/common/io/ByteProcessor<TT;>;)TT;
    MethodParameters:
           Name  Flags
      processor  

  public long copyTo(java.io.OutputStream);
    descriptor: (Ljava/io/OutputStream;)J
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
        start local 1 // java.io.OutputStream output
         0: .line 616
            aload 1 /* output */
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.bytes:[B
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.offset:I
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            invokevirtual java.io.OutputStream.write:([BII)V
         1: .line 617
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            i2l
            lreturn
        end local 1 // java.io.OutputStream output
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    2     0    this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;
            0    2     1  output  Ljava/io/OutputStream;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
        Name  Flags
      output  

  public com.google.common.hash.HashCode hash(com.google.common.hash.HashFunction);
    descriptor: (Lcom/google/common/hash/HashFunction;)Lcom/google/common/hash/HashCode;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
        start local 1 // com.google.common.hash.HashFunction hashFunction
         0: .line 622
            aload 1 /* hashFunction */
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.bytes:[B
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.offset:I
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            invokeinterface com.google.common.hash.HashFunction.hashBytes:([BII)Lcom/google/common/hash/HashCode;
            areturn
        end local 1 // com.google.common.hash.HashFunction hashFunction
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    1     0          this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;
            0    1     1  hashFunction  Lcom/google/common/hash/HashFunction;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
              Name  Flags
      hashFunction  

  public com.google.common.io.ByteSource slice(long, long);
    descriptor: (JJ)Lcom/google/common/io/ByteSource;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=6, args_size=3
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
        start local 1 // long offset
        start local 3 // long length
         0: .line 627
            lload 1 /* offset */
            lconst_0
            lcmp
            iflt 1
            iconst_1
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_0
      StackMap locals:
      StackMap stack: int
         2: ldc "offset (%s) may not be negative"
            lload 1 /* offset */
            invokestatic com.google.common.base.Preconditions.checkArgument:(ZLjava/lang/String;J)V
         3: .line 628
            lload 3 /* length */
            lconst_0
            lcmp
            iflt 4
            iconst_1
            goto 5
      StackMap locals:
      StackMap stack:
         4: iconst_0
      StackMap locals:
      StackMap stack: int
         5: ldc "length (%s) may not be negative"
            lload 3 /* length */
            invokestatic com.google.common.base.Preconditions.checkArgument:(ZLjava/lang/String;J)V
         6: .line 630
            lload 1 /* offset */
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            i2l
            invokestatic java.lang.Math.min:(JJ)J
            lstore 1 /* offset */
         7: .line 631
            lload 3 /* length */
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            i2l
            lload 1 /* offset */
            lsub
            invokestatic java.lang.Math.min:(JJ)J
            lstore 3 /* length */
         8: .line 632
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.offset:I
            lload 1 /* offset */
            l2i
            iadd
            istore 5 /* newOffset */
        start local 5 // int newOffset
         9: .line 633
            new com.google.common.io.ByteSource$ByteArrayByteSource
            dup
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.bytes:[B
            iload 5 /* newOffset */
            lload 3 /* length */
            l2i
            invokespecial com.google.common.io.ByteSource$ByteArrayByteSource.<init>:([BII)V
            areturn
        end local 5 // int newOffset
        end local 3 // long length
        end local 1 // long offset
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0   10     0       this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;
            0   10     1     offset  J
            0   10     3     length  J
            9   10     5  newOffset  I
    MethodParameters:
        Name  Flags
      offset  
      length  

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
         0: .line 638
            new java.lang.StringBuilder
            dup
            ldc "ByteSource.wrap("
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
         1: .line 639
            invokestatic com.google.common.io.BaseEncoding.base16:()Lcom/google/common/io/BaseEncoding;
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.bytes:[B
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.offset:I
            aload 0 /* this */
            getfield com.google.common.io.ByteSource$ByteArrayByteSource.length:I
            invokevirtual com.google.common.io.BaseEncoding.encode:([BII)Ljava/lang/String;
            bipush 30
            ldc "..."
            invokestatic com.google.common.base.Ascii.truncate:(Ljava/lang/CharSequence;ILjava/lang/String;)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
         2: .line 640
            ldc ")"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
         3: .line 638
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // com.google.common.io.ByteSource$ByteArrayByteSource this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lcom/google/common/io/ByteSource$ByteArrayByteSource;
}
SourceFile: "ByteSource.java"
NestHost: com.google.common.io.ByteSource
InnerClasses:
  private ByteArrayByteSource = com.google.common.io.ByteSource$ByteArrayByteSource of com.google.common.io.ByteSource