https://github.com/oracle/graal: GraalVM is an ecosystem for compiling and running applications written in multiple languages. GraalVM removes the isolation between programming languages and enables interoperability in a shared runtime. 
class org.graalvm.polyglot.Engine$1 implements java.security.PrivilegedAction<org.graalvm.polyglot.impl.AbstractPolyglotImpl>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.graalvm.polyglot.Engine$1
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.graalvm.polyglot.Engine$1 this
         0: .line 707
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.graalvm.polyglot.Engine$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/polyglot/Engine$1;

  public org.graalvm.polyglot.impl.AbstractPolyglotImpl run();
    descriptor: ()Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=4, args_size=1
        start local 0 // org.graalvm.polyglot.Engine$1 this
         0: .line 709
            aconst_null
            astore 1 /* engine */
        start local 1 // org.graalvm.polyglot.impl.AbstractPolyglotImpl engine
         1: .line 710
            aconst_null
            astore 2 /* servicesClass */
        start local 2 // java.lang.Class servicesClass
         2: .line 711
            ldc "graalvm.ForcePolyglotInvalid"
            invokestatic java.lang.Boolean.getBoolean:(Ljava/lang/String;)Z
            ifeq 5
         3: .line 712
            invokestatic org.graalvm.polyglot.Engine.createInvalidPolyglotImpl:()Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
            astore 1 /* engine */
         4: .line 713
            goto 15
         5: .line 714
      StackMap locals: org.graalvm.polyglot.impl.AbstractPolyglotImpl java.lang.Class
      StackMap stack:
            getstatic org.graalvm.polyglot.Engine.JDK8_OR_EARLIER:Z
            ifeq 15
         6: .line 716
            ldc "jdk.vm.ci.services.Services"
            invokestatic java.lang.Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
            astore 2 /* servicesClass */
         7: .line 717
            goto 9
      StackMap locals:
      StackMap stack: java.lang.ClassNotFoundException
         8: pop
         9: .line 719
      StackMap locals:
      StackMap stack:
            aload 2 /* servicesClass */
            ifnull 15
        10: .line 721
            aload 2 /* servicesClass */
            ldc "loadSingle"
            iconst_2
            anewarray java.lang.Class
            dup
            iconst_0
            ldc Ljava/lang/Class;
            aastore
            dup
            iconst_1
            getstatic java.lang.Boolean.TYPE:Ljava/lang/Class;
            aastore
            invokevirtual java.lang.Class.getDeclaredMethod:(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;
            astore 3 /* m */
        start local 3 // java.lang.reflect.Method m
        11: .line 722
            aload 3 /* m */
            aconst_null
            iconst_2
            anewarray java.lang.Object
            dup
            iconst_0
            ldc Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
            aastore
            dup
            iconst_1
            iconst_0
            invokestatic java.lang.Boolean.valueOf:(Z)Ljava/lang/Boolean;
            aastore
            invokevirtual java.lang.reflect.Method.invoke:(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
            checkcast org.graalvm.polyglot.impl.AbstractPolyglotImpl
            astore 1 /* engine */
        end local 3 // java.lang.reflect.Method m
        12: .line 723
            goto 15
      StackMap locals:
      StackMap stack: java.lang.Throwable
        13: astore 3 /* e */
        start local 3 // java.lang.Throwable e
        14: .line 725
            new java.lang.InternalError
            dup
            aload 3 /* e */
            invokespecial java.lang.InternalError.<init>:(Ljava/lang/Throwable;)V
            athrow
        end local 3 // java.lang.Throwable e
        15: .line 731
      StackMap locals:
      StackMap stack:
            aload 1 /* engine */
            ifnonnull 17
        16: .line 733
            aload 0 /* this */
            invokevirtual org.graalvm.polyglot.Engine$1.searchServiceLoader:()Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
            astore 1 /* engine */
        17: .line 735
      StackMap locals:
      StackMap stack:
            aload 1 /* engine */
            ifnonnull 19
        18: .line 736
            invokestatic org.graalvm.polyglot.Engine.createInvalidPolyglotImpl:()Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
            astore 1 /* engine */
        19: .line 738
      StackMap locals:
      StackMap stack:
            aload 1 /* engine */
            ifnull 21
        20: .line 739
            aload 1 /* engine */
            new org.graalvm.polyglot.Engine$APIAccessImpl
            dup
            invokespecial org.graalvm.polyglot.Engine$APIAccessImpl.<init>:()V
            invokevirtual org.graalvm.polyglot.impl.AbstractPolyglotImpl.setConstructors:(Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$APIAccess;)V
        21: .line 741
      StackMap locals:
      StackMap stack:
            aload 1 /* engine */
            areturn
        end local 2 // java.lang.Class servicesClass
        end local 1 // org.graalvm.polyglot.impl.AbstractPolyglotImpl engine
        end local 0 // org.graalvm.polyglot.Engine$1 this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   22     0           this  Lorg/graalvm/polyglot/Engine$1;
            1   22     1         engine  Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
            2   22     2  servicesClass  Ljava/lang/Class<*>;
           11   12     3              m  Ljava/lang/reflect/Method;
           14   15     3              e  Ljava/lang/Throwable;
      Exception table:
        from    to  target  type
           6     7       8  Class java.lang.ClassNotFoundException
          10    12      13  Class java.lang.Throwable

  private org.graalvm.polyglot.impl.AbstractPolyglotImpl searchServiceLoader();
    descriptor: ()Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=7, locals=3, args_size=1
        start local 0 // org.graalvm.polyglot.Engine$1 this
         0: .line 745
            ldc Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
            invokestatic java.util.ServiceLoader.load:(Ljava/lang/Class;)Ljava/util/ServiceLoader;
            invokevirtual java.util.ServiceLoader.iterator:()Ljava/util/Iterator;
            astore 1 /* providers */
        start local 1 // java.util.Iterator providers
         1: .line 746
            aload 1 /* providers */
            invokeinterface java.util.Iterator.hasNext:()Z
            ifeq 6
         2: .line 747
            aload 1 /* providers */
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast org.graalvm.polyglot.impl.AbstractPolyglotImpl
            astore 2 /* found */
        start local 2 // org.graalvm.polyglot.impl.AbstractPolyglotImpl found
         3: .line 748
            aload 1 /* providers */
            invokeinterface java.util.Iterator.hasNext:()Z
            ifeq 5
         4: .line 749
            new java.lang.InternalError
            dup
            ldc "Multiple %s providers found"
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            ldc Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            aastore
            invokestatic java.lang.String.format:(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.InternalError.<init>:(Ljava/lang/String;)V
            athrow
         5: .line 751
      StackMap locals: java.util.Iterator org.graalvm.polyglot.impl.AbstractPolyglotImpl
      StackMap stack:
            aload 2 /* found */
            areturn
        end local 2 // org.graalvm.polyglot.impl.AbstractPolyglotImpl found
         6: .line 753
      StackMap locals:
      StackMap stack:
            aconst_null
            areturn
        end local 1 // java.util.Iterator providers
        end local 0 // org.graalvm.polyglot.Engine$1 this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    7     0       this  Lorg/graalvm/polyglot/Engine$1;
            1    7     1  providers  Ljava/util/Iterator<Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;>;
            3    6     2      found  Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
    Exceptions:
      throws java.lang.InternalError

  public java.lang.Object run();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual org.graalvm.polyglot.Engine$1.run:()Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/security/PrivilegedAction<Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;>;
SourceFile: "Engine.java"
EnclosingMethod: org.graalvm.polyglot.Engine.initEngineImpl:()Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl;
NestHost: org.graalvm.polyglot.Engine
InnerClasses:
  org.graalvm.polyglot.Engine$1
  APIAccessImpl = org.graalvm.polyglot.Engine$APIAccessImpl of org.graalvm.polyglot.Engine
  public abstract APIAccess = org.graalvm.polyglot.impl.AbstractPolyglotImpl$APIAccess of org.graalvm.polyglot.impl.AbstractPolyglotImpl