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.MoreFiles$PathByteSink extends com.google.common.io.ByteSink
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.io.MoreFiles$PathByteSink
  super_class: com.google.common.io.ByteSink
{
  private final java.nio.file.Path path;
    descriptor: Ljava/nio/file/Path;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.nio.file.OpenOption[] options;
    descriptor: [Ljava/nio/file/OpenOption;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private void <init>(java.nio.file.Path, java.nio.file.OpenOption[]);
    descriptor: (Ljava/nio/file/Path;[Ljava/nio/file/OpenOption;)V
    flags: (0x0082) ACC_PRIVATE, ACC_VARARGS
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.google.common.io.MoreFiles$PathByteSink this
        start local 1 // java.nio.file.Path path
        start local 2 // java.nio.file.OpenOption[] options
         0: .line 209
            aload 0 /* this */
            invokespecial com.google.common.io.ByteSink.<init>:()V
         1: .line 210
            aload 0 /* this */
            aload 1 /* path */
            invokestatic com.google.common.base.Preconditions.checkNotNull:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.nio.file.Path
            putfield com.google.common.io.MoreFiles$PathByteSink.path:Ljava/nio/file/Path;
         2: .line 211
            aload 0 /* this */
            aload 2 /* options */
            invokevirtual java.nio.file.OpenOption[].clone:()Ljava/lang/Object;
            checkcast java.nio.file.OpenOption[]
            putfield com.google.common.io.MoreFiles$PathByteSink.options:[Ljava/nio/file/OpenOption;
         3: .line 213
            return
        end local 2 // java.nio.file.OpenOption[] options
        end local 1 // java.nio.file.Path path
        end local 0 // com.google.common.io.MoreFiles$PathByteSink this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    4     0     this  Lcom/google/common/io/MoreFiles$PathByteSink;
            0    4     1     path  Ljava/nio/file/Path;
            0    4     2  options  [Ljava/nio/file/OpenOption;
    MethodParameters:
         Name  Flags
      path     
      options  

  public java.io.OutputStream openStream();
    descriptor: ()Ljava/io/OutputStream;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.io.MoreFiles$PathByteSink this
         0: .line 217
            aload 0 /* this */
            getfield com.google.common.io.MoreFiles$PathByteSink.path:Ljava/nio/file/Path;
            aload 0 /* this */
            getfield com.google.common.io.MoreFiles$PathByteSink.options:[Ljava/nio/file/OpenOption;
            invokestatic java.nio.file.Files.newOutputStream:(Ljava/nio/file/Path;[Ljava/nio/file/OpenOption;)Ljava/io/OutputStream;
            areturn
        end local 0 // com.google.common.io.MoreFiles$PathByteSink this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/io/MoreFiles$PathByteSink;
    Exceptions:
      throws java.io.IOException

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.google.common.io.MoreFiles$PathByteSink this
         0: .line 222
            new java.lang.StringBuilder
            dup
            ldc "MoreFiles.asByteSink("
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield com.google.common.io.MoreFiles$PathByteSink.path:Ljava/nio/file/Path;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            ldc ", "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 0 /* this */
            getfield com.google.common.io.MoreFiles$PathByteSink.options:[Ljava/nio/file/OpenOption;
            invokestatic java.util.Arrays.toString:([Ljava/lang/Object;)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc ")"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // com.google.common.io.MoreFiles$PathByteSink this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/io/MoreFiles$PathByteSink;
}
SourceFile: "MoreFiles.java"
NestHost: com.google.common.io.MoreFiles
InnerClasses:
  private final PathByteSink = com.google.common.io.MoreFiles$PathByteSink of com.google.common.io.MoreFiles