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. 
public final class com.google.common.io.Resources
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.google.common.io.Resources
  super_class: java.lang.Object
{
  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.io.Resources this
         0: .line 48
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.google.common.io.Resources this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/io/Resources;

  public static com.google.common.io.ByteSource asByteSource(java.net.URL);
    descriptor: (Ljava/net/URL;)Lcom/google/common/io/ByteSource;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // java.net.URL url
         0: .line 56
            new com.google.common.io.Resources$UrlByteSource
            dup
            aload 0 /* url */
            invokespecial com.google.common.io.Resources$UrlByteSource.<init>:(Ljava/net/URL;)V
            areturn
        end local 0 // java.net.URL url
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0   url  Ljava/net/URL;
    MethodParameters:
      Name  Flags
      url   

  public static com.google.common.io.CharSource asCharSource(java.net.URL, java.nio.charset.Charset);
    descriptor: (Ljava/net/URL;Ljava/nio/charset/Charset;)Lcom/google/common/io/CharSource;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // java.net.URL url
        start local 1 // java.nio.charset.Charset charset
         0: .line 85
            aload 0 /* url */
            invokestatic com.google.common.io.Resources.asByteSource:(Ljava/net/URL;)Lcom/google/common/io/ByteSource;
            aload 1 /* charset */
            invokevirtual com.google.common.io.ByteSource.asCharSource:(Ljava/nio/charset/Charset;)Lcom/google/common/io/CharSource;
            areturn
        end local 1 // java.nio.charset.Charset charset
        end local 0 // java.net.URL url
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0      url  Ljava/net/URL;
            0    1     1  charset  Ljava/nio/charset/Charset;
    MethodParameters:
         Name  Flags
      url      
      charset  

  public static byte[] toByteArray(java.net.URL);
    descriptor: (Ljava/net/URL;)[B
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // java.net.URL url
         0: .line 96
            aload 0 /* url */
            invokestatic com.google.common.io.Resources.asByteSource:(Ljava/net/URL;)Lcom/google/common/io/ByteSource;
            invokevirtual com.google.common.io.ByteSource.read:()[B
            areturn
        end local 0 // java.net.URL url
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0   url  Ljava/net/URL;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      url   

  public static java.lang.String toString(java.net.URL, java.nio.charset.Charset);
    descriptor: (Ljava/net/URL;Ljava/nio/charset/Charset;)Ljava/lang/String;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // java.net.URL url
        start local 1 // java.nio.charset.Charset charset
         0: .line 109
            aload 0 /* url */
            aload 1 /* charset */
            invokestatic com.google.common.io.Resources.asCharSource:(Ljava/net/URL;Ljava/nio/charset/Charset;)Lcom/google/common/io/CharSource;
            invokevirtual com.google.common.io.CharSource.read:()Ljava/lang/String;
            areturn
        end local 1 // java.nio.charset.Charset charset
        end local 0 // java.net.URL url
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0      url  Ljava/net/URL;
            0    1     1  charset  Ljava/nio/charset/Charset;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
         Name  Flags
      url      
      charset  

  public static <T> T readLines(java.net.URL, java.nio.charset.Charset, com.google.common.io.LineProcessor<T>);
    descriptor: (Ljava/net/URL;Ljava/nio/charset/Charset;Lcom/google/common/io/LineProcessor;)Ljava/lang/Object;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // java.net.URL url
        start local 1 // java.nio.charset.Charset charset
        start local 2 // com.google.common.io.LineProcessor callback
         0: .line 126
            aload 0 /* url */
            aload 1 /* charset */
            invokestatic com.google.common.io.Resources.asCharSource:(Ljava/net/URL;Ljava/nio/charset/Charset;)Lcom/google/common/io/CharSource;
            aload 2 /* callback */
            invokevirtual com.google.common.io.CharSource.readLines:(Lcom/google/common/io/LineProcessor;)Ljava/lang/Object;
            areturn
        end local 2 // com.google.common.io.LineProcessor callback
        end local 1 // java.nio.charset.Charset charset
        end local 0 // java.net.URL url
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0       url  Ljava/net/URL;
            0    1     1   charset  Ljava/nio/charset/Charset;
            0    1     2  callback  Lcom/google/common/io/LineProcessor<TT;>;
    Exceptions:
      throws java.io.IOException
    Signature: <T:Ljava/lang/Object;>(Ljava/net/URL;Ljava/nio/charset/Charset;Lcom/google/common/io/LineProcessor<TT;>;)TT;
    RuntimeInvisibleAnnotations: 
      com.google.errorprone.annotations.CanIgnoreReturnValue()
    MethodParameters:
          Name  Flags
      url       
      charset   
      callback  

  public static java.util.List<java.lang.String> readLines(java.net.URL, java.nio.charset.Charset);
    descriptor: (Ljava/net/URL;Ljava/nio/charset/Charset;)Ljava/util/List;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // java.net.URL url
        start local 1 // java.nio.charset.Charset charset
         0: .line 146
            aload 0 /* url */
         1: .line 147
            aload 1 /* charset */
         2: .line 148
            new com.google.common.io.Resources$1
            dup
            invokespecial com.google.common.io.Resources$1.<init>:()V
         3: .line 145
            invokestatic com.google.common.io.Resources.readLines:(Ljava/net/URL;Ljava/nio/charset/Charset;Lcom/google/common/io/LineProcessor;)Ljava/lang/Object;
            checkcast java.util.List
            areturn
        end local 1 // java.nio.charset.Charset charset
        end local 0 // java.net.URL url
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    4     0      url  Ljava/net/URL;
            0    4     1  charset  Ljava/nio/charset/Charset;
    Exceptions:
      throws java.io.IOException
    Signature: (Ljava/net/URL;Ljava/nio/charset/Charset;)Ljava/util/List<Ljava/lang/String;>;
    MethodParameters:
         Name  Flags
      url      
      charset  

  public static void copy(java.net.URL, java.io.OutputStream);
    descriptor: (Ljava/net/URL;Ljava/io/OutputStream;)V
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // java.net.URL from
        start local 1 // java.io.OutputStream to
         0: .line 172
            aload 0 /* from */
            invokestatic com.google.common.io.Resources.asByteSource:(Ljava/net/URL;)Lcom/google/common/io/ByteSource;
            aload 1 /* to */
            invokevirtual com.google.common.io.ByteSource.copyTo:(Ljava/io/OutputStream;)J
            pop2
         1: .line 173
            return
        end local 1 // java.io.OutputStream to
        end local 0 // java.net.URL from
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  from  Ljava/net/URL;
            0    2     1    to  Ljava/io/OutputStream;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      from  
      to    

  public static java.net.URL getResource(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/net/URL;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // java.lang.String resourceName
         0: .line 193
            invokestatic java.lang.Thread.currentThread:()Ljava/lang/Thread;
            invokevirtual java.lang.Thread.getContextClassLoader:()Ljava/lang/ClassLoader;
            ldc Lcom/google/common/io/Resources;
            invokevirtual java.lang.Class.getClassLoader:()Ljava/lang/ClassLoader;
         1: .line 192
            invokestatic com.google.common.base.MoreObjects.firstNonNull:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.lang.ClassLoader
         2: .line 191
            astore 1 /* loader */
        start local 1 // java.lang.ClassLoader loader
         3: .line 194
            aload 1 /* loader */
            aload 0 /* resourceName */
            invokevirtual java.lang.ClassLoader.getResource:(Ljava/lang/String;)Ljava/net/URL;
            astore 2 /* url */
        start local 2 // java.net.URL url
         4: .line 195
            aload 2 /* url */
            ifnull 5
            iconst_1
            goto 6
      StackMap locals: java.lang.ClassLoader java.net.URL
      StackMap stack:
         5: iconst_0
      StackMap locals:
      StackMap stack: int
         6: ldc "resource %s not found."
            aload 0 /* resourceName */
            invokestatic com.google.common.base.Preconditions.checkArgument:(ZLjava/lang/String;Ljava/lang/Object;)V
         7: .line 196
            aload 2 /* url */
            areturn
        end local 2 // java.net.URL url
        end local 1 // java.lang.ClassLoader loader
        end local 0 // java.lang.String resourceName
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    8     0  resourceName  Ljava/lang/String;
            3    8     1        loader  Ljava/lang/ClassLoader;
            4    8     2           url  Ljava/net/URL;
    RuntimeInvisibleAnnotations: 
      com.google.errorprone.annotations.CanIgnoreReturnValue()
    MethodParameters:
              Name  Flags
      resourceName  

  public static java.net.URL getResource(java.lang.Class<?>, java.lang.String);
    descriptor: (Ljava/lang/Class;Ljava/lang/String;)Ljava/net/URL;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=3, args_size=2
        start local 0 // java.lang.Class contextClass
        start local 1 // java.lang.String resourceName
         0: .line 206
            aload 0 /* contextClass */
            aload 1 /* resourceName */
            invokevirtual java.lang.Class.getResource:(Ljava/lang/String;)Ljava/net/URL;
            astore 2 /* url */
        start local 2 // java.net.URL url
         1: .line 208
            aload 2 /* url */
            ifnull 2
            iconst_1
            goto 3
      StackMap locals: java.net.URL
      StackMap stack:
         2: iconst_0
      StackMap locals:
      StackMap stack: int
         3: ldc "resource %s relative to %s not found."
            aload 1 /* resourceName */
            aload 0 /* contextClass */
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
         4: .line 207
            invokestatic com.google.common.base.Preconditions.checkArgument:(ZLjava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V
         5: .line 209
            aload 2 /* url */
            areturn
        end local 2 // java.net.URL url
        end local 1 // java.lang.String resourceName
        end local 0 // java.lang.Class contextClass
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    6     0  contextClass  Ljava/lang/Class<*>;
            0    6     1  resourceName  Ljava/lang/String;
            1    6     2           url  Ljava/net/URL;
    Signature: (Ljava/lang/Class<*>;Ljava/lang/String;)Ljava/net/URL;
    MethodParameters:
              Name  Flags
      contextClass  
      resourceName  
}
SourceFile: "Resources.java"
NestMembers:
  com.google.common.io.Resources$1  com.google.common.io.Resources$UrlByteSource
InnerClasses:
  com.google.common.io.Resources$1
  private final UrlByteSource = com.google.common.io.Resources$UrlByteSource of com.google.common.io.Resources
    RuntimeInvisibleAnnotations: 
      com.google.common.annotations.Beta()
      com.google.common.annotations.GwtIncompatible()