https://www.graalvm.org/ 
interface com.oracle.truffle.llvm.runtime.LLVMIVarBitLarge$SimpleOp
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.llvm.runtime.LLVMIVarBitLarge$SimpleOp
  super_class: java.lang.Object
{
  public abstract byte op(byte, byte);
    descriptor: (BB)B
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      a     
      b     
}
SourceFile: "LLVMIVarBitLarge.java"
NestHost: com.oracle.truffle.llvm.runtime.LLVMIVarBitLarge
InnerClasses:
  private abstract SimpleOp = com.oracle.truffle.llvm.runtime.LLVMIVarBitLarge$SimpleOp of com.oracle.truffle.llvm.runtime.LLVMIVarBitLarge