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.BaseEncoding$DecodingException extends java.io.IOException
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.google.common.io.BaseEncoding$DecodingException
  super_class: java.io.IOException
{
  void <init>(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.io.BaseEncoding$DecodingException this
        start local 1 // java.lang.String message
         0: .line 138
            aload 0 /* this */
            aload 1 /* message */
            invokespecial java.io.IOException.<init>:(Ljava/lang/String;)V
         1: .line 139
            return
        end local 1 // java.lang.String message
        end local 0 // com.google.common.io.BaseEncoding$DecodingException this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    2     0     this  Lcom/google/common/io/BaseEncoding$DecodingException;
            0    2     1  message  Ljava/lang/String;
    MethodParameters:
         Name  Flags
      message  

  void <init>(java.lang.Throwable);
    descriptor: (Ljava/lang/Throwable;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.io.BaseEncoding$DecodingException this
        start local 1 // java.lang.Throwable cause
         0: .line 142
            aload 0 /* this */
            aload 1 /* cause */
            invokespecial java.io.IOException.<init>:(Ljava/lang/Throwable;)V
         1: .line 143
            return
        end local 1 // java.lang.Throwable cause
        end local 0 // com.google.common.io.BaseEncoding$DecodingException this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lcom/google/common/io/BaseEncoding$DecodingException;
            0    2     1  cause  Ljava/lang/Throwable;
    MethodParameters:
       Name  Flags
      cause  
}
SourceFile: "BaseEncoding.java"
NestHost: com.google.common.io.BaseEncoding
InnerClasses:
  public final DecodingException = com.google.common.io.BaseEncoding$DecodingException of com.google.common.io.BaseEncoding