https://www.graalvm.org/ 
public final class com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule implements org.junit.rules.TestRule
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule
  super_class: java.lang.Object
{
  org.graalvm.polyglot.Context$Builder contextBuilder;
    descriptor: Lorg/graalvm/polyglot/Context$Builder;
    flags: (0x0000) 

  org.graalvm.polyglot.Context context;
    descriptor: Lorg/graalvm/polyglot/Context;
    flags: (0x0000) 

  com.oracle.truffle.api.TruffleLanguage$Env testEnv;
    descriptor: Lcom/oracle/truffle/api/TruffleLanguage$Env;
    flags: (0x0000) 

  static final boolean $assertionsDisabled;
    descriptor: Z
    flags: (0x1018) ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 232
            ldc Lcom/oracle/truffle/tck/TruffleRunner;
            invokevirtual java.lang.Class.desiredAssertionStatus:()Z
            ifne 1
            iconst_1
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_0
      StackMap locals:
      StackMap stack: int
         2: putstatic com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule this
         0: .line 243
            aload 0 /* this */
            iconst_0
            anewarray java.lang.String
            invokestatic org.graalvm.polyglot.Context.newBuilder:([Ljava/lang/String;)Lorg/graalvm/polyglot/Context$Builder;
            iconst_1
            invokevirtual org.graalvm.polyglot.Context$Builder.allowAllAccess:(Z)Lorg/graalvm/polyglot/Context$Builder;
            invokespecial com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.<init>:(Lorg/graalvm/polyglot/Context$Builder;)V
         1: .line 244
            return
        end local 0 // com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/tck/TruffleRunner$RunWithPolyglotRule;

  public void <init>(org.graalvm.polyglot.Context$Builder);
    descriptor: (Lorg/graalvm/polyglot/Context$Builder;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule this
        start local 1 // org.graalvm.polyglot.Context$Builder contextBuilder
         0: .line 250
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 236
            aload 0 /* this */
            aconst_null
            putfield com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.context:Lorg/graalvm/polyglot/Context;
         2: .line 237
            aload 0 /* this */
            aconst_null
            putfield com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.testEnv:Lcom/oracle/truffle/api/TruffleLanguage$Env;
         3: .line 251
            aload 0 /* this */
            aload 1 /* contextBuilder */
            putfield com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.contextBuilder:Lorg/graalvm/polyglot/Context$Builder;
         4: .line 252
            return
        end local 1 // org.graalvm.polyglot.Context$Builder contextBuilder
        end local 0 // com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    5     0            this  Lcom/oracle/truffle/tck/TruffleRunner$RunWithPolyglotRule;
            0    5     1  contextBuilder  Lorg/graalvm/polyglot/Context$Builder;
    MethodParameters:
                Name  Flags
      contextBuilder  

  public org.junit.runners.model.Statement apply(org.junit.runners.model.Statement, org.junit.runner.Description);
    descriptor: (Lorg/junit/runners/model/Statement;Lorg/junit/runner/Description;)Lorg/junit/runners/model/Statement;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule this
        start local 1 // org.junit.runners.model.Statement stmt
        start local 2 // org.junit.runner.Description description
         0: .line 261
            aload 0 /* this */
            aload 1 /* stmt */
            invokestatic com.oracle.truffle.tck.TruffleTestInvoker.withTruffleContext:(Lcom/oracle/truffle/tck/TruffleRunner$RunWithPolyglotRule;Lorg/junit/runners/model/Statement;)Lorg/junit/runners/model/Statement;
            areturn
        end local 2 // org.junit.runner.Description description
        end local 1 // org.junit.runners.model.Statement stmt
        end local 0 // com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    1     0         this  Lcom/oracle/truffle/tck/TruffleRunner$RunWithPolyglotRule;
            0    1     1         stmt  Lorg/junit/runners/model/Statement;
            0    1     2  description  Lorg/junit/runner/Description;
    MethodParameters:
             Name  Flags
      stmt         
      description  

  public org.graalvm.polyglot.Context getPolyglotContext();
    descriptor: ()Lorg/graalvm/polyglot/Context;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule this
         0: .line 274
            getstatic com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.$assertionsDisabled:Z
            ifne 1
            aload 0 /* this */
            getfield com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.context:Lorg/graalvm/polyglot/Context;
            ifnonnull 1
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         1: .line 275
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.context:Lorg/graalvm/polyglot/Context;
            areturn
        end local 0 // com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/tck/TruffleRunner$RunWithPolyglotRule;

  public com.oracle.truffle.api.TruffleLanguage$Env getTruffleTestEnv();
    descriptor: ()Lcom/oracle/truffle/api/TruffleLanguage$Env;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule this
         0: .line 289
            getstatic com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.$assertionsDisabled:Z
            ifne 1
            aload 0 /* this */
            getfield com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.testEnv:Lcom/oracle/truffle/api/TruffleLanguage$Env;
            ifnonnull 1
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         1: .line 290
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.testEnv:Lcom/oracle/truffle/api/TruffleLanguage$Env;
            areturn
        end local 0 // com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/oracle/truffle/tck/TruffleRunner$RunWithPolyglotRule;
}
SourceFile: "TruffleRunner.java"
NestHost: com.oracle.truffle.tck.TruffleRunner
InnerClasses:
  public final Env = com.oracle.truffle.api.TruffleLanguage$Env of com.oracle.truffle.api.TruffleLanguage
  public final RunWithPolyglotRule = com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule of com.oracle.truffle.tck.TruffleRunner
  public final Builder = org.graalvm.polyglot.Context$Builder of org.graalvm.polyglot.Context