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.MoreFiles$PathByteSource$1 extends com.google.common.io.ByteSource$AsCharSource
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.io.MoreFiles$PathByteSource$1
  super_class: com.google.common.io.ByteSource$AsCharSource
{
  final com.google.common.io.MoreFiles$PathByteSource this$1;
    descriptor: Lcom/google/common/io/MoreFiles$PathByteSource;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.google.common.io.MoreFiles$PathByteSource, com.google.common.io.ByteSource, java.nio.charset.Charset);
    descriptor: (Lcom/google/common/io/MoreFiles$PathByteSource;Lcom/google/common/io/ByteSource;Ljava/nio/charset/Charset;)V
    flags: (0x0000) 
    Code:
      stack=3, locals=4, args_size=4
        start local 0 // com.google.common.io.MoreFiles$PathByteSource$1 this
        start local 3 // java.nio.charset.Charset $anonymous0
         0: .line 172
            aload 0 /* this */
            aload 1
            putfield com.google.common.io.MoreFiles$PathByteSource$1.this$1:Lcom/google/common/io/MoreFiles$PathByteSource;
            aload 0 /* this */
            aload 2
            aload 3 /* $anonymous0 */
            invokespecial com.google.common.io.ByteSource$AsCharSource.<init>:(Lcom/google/common/io/ByteSource;Ljava/nio/charset/Charset;)V
            return
        end local 3 // java.nio.charset.Charset $anonymous0
        end local 0 // com.google.common.io.MoreFiles$PathByteSource$1 this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    1     0         this  Lcom/google/common/io/MoreFiles$PathByteSource$1;
            0    1     3  $anonymous0  Ljava/nio/charset/Charset;
    MethodParameters:
             Name  Flags
      this$0       final
      this$1       final
      $anonymous0  

  public java.util.stream.Stream<java.lang.String> lines();
    descriptor: ()Ljava/util/stream/Stream;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.io.MoreFiles$PathByteSource$1 this
         0: .line 176
            aload 0 /* this */
            getfield com.google.common.io.MoreFiles$PathByteSource$1.this$1:Lcom/google/common/io/MoreFiles$PathByteSource;
            getfield com.google.common.io.MoreFiles$PathByteSource.path:Ljava/nio/file/Path;
            aload 0 /* this */
            getfield com.google.common.io.MoreFiles$PathByteSource$1.charset:Ljava/nio/charset/Charset;
            invokestatic java.nio.file.Files.lines:(Ljava/nio/file/Path;Ljava/nio/charset/Charset;)Ljava/util/stream/Stream;
            areturn
        end local 0 // com.google.common.io.MoreFiles$PathByteSource$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/io/MoreFiles$PathByteSource$1;
    Exceptions:
      throws java.io.IOException
    Signature: ()Ljava/util/stream/Stream<Ljava/lang/String;>;
}
SourceFile: "MoreFiles.java"
EnclosingMethod: com.google.common.io.MoreFiles$PathByteSource.asCharSource:(Ljava/nio/charset/Charset;)Lcom/google/common/io/CharSource;
NestHost: com.google.common.io.MoreFiles
InnerClasses:
  AsCharSource = com.google.common.io.ByteSource$AsCharSource of com.google.common.io.ByteSource
  private final PathByteSource = com.google.common.io.MoreFiles$PathByteSource of com.google.common.io.MoreFiles
  com.google.common.io.MoreFiles$PathByteSource$1