https://www.graalvm.org/ 
public final class com.oracle.truffle.js.builtins.PerformanceBuiltins extends com.oracle.truffle.js.builtins.JSBuiltinsContainer$Lambda
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.js.builtins.PerformanceBuiltins
  super_class: com.oracle.truffle.js.builtins.JSBuiltinsContainer$Lambda
{
  public static final com.oracle.truffle.js.builtins.JSBuiltinsContainer BUILTINS;
    descriptor: Lcom/oracle/truffle/js/builtins/JSBuiltinsContainer;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  protected void <init>();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.builtins.PerformanceBuiltins this
         0: .line 44
            new java.lang.Error
            dup
            ldc "Unresolved compilation problems: \n\tThe import com.oracle.truffle.js.builtins.PerformanceBuiltinsFactory cannot be resolved\n\tJSPerformanceNowNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // com.oracle.truffle.js.builtins.PerformanceBuiltins this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/js/builtins/PerformanceBuiltins;
}
SourceFile: "PerformanceBuiltins.java"
NestMembers:
  com.oracle.truffle.js.builtins.PerformanceBuiltins$JSPerformanceNowNode
InnerClasses:
  public abstract Lambda = com.oracle.truffle.js.builtins.JSBuiltinsContainer$Lambda of com.oracle.truffle.js.builtins.JSBuiltinsContainer
  public abstract JSPerformanceNowNode = com.oracle.truffle.js.builtins.PerformanceBuiltins$JSPerformanceNowNode of com.oracle.truffle.js.builtins.PerformanceBuiltins