https://www.graalvm.org/ 
abstract class com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage extends com.oracle.truffle.api.TruffleLanguage<com.oracle.truffle.api.TruffleLanguageSnippets$Context>
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage
  super_class: com.oracle.truffle.api.TruffleLanguage
{
  private final org.graalvm.options.OptionKey<java.lang.String> version;
    descriptor: Lorg/graalvm/options/OptionKey;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Lorg/graalvm/options/OptionKey<Ljava/lang/String;>;

  final com.oracle.truffle.api.TruffleLanguageSnippets this$0;
    descriptor: Lcom/oracle/truffle/api/TruffleLanguageSnippets;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.api.TruffleLanguageSnippets);
    descriptor: (Lcom/oracle/truffle/api/TruffleLanguageSnippets;)V
    flags: (0x0000) 
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage this
         0: .line 3740
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage.this$0:Lcom/oracle/truffle/api/TruffleLanguageSnippets;
            aload 0 /* this */
            invokespecial com.oracle.truffle.api.TruffleLanguage.<init>:()V
         1: .line 3742
            aload 0 /* this */
            new org.graalvm.options.OptionKey
            dup
            ldc "2.0"
            invokespecial org.graalvm.options.OptionKey.<init>:(Ljava/lang/Object;)V
            putfield com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage.version:Lorg/graalvm/options/OptionKey;
         2: .line 3740
            return
        end local 0 // com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/api/TruffleLanguageSnippets$PreInitializedLanguage;
    MethodParameters:
        Name  Flags
      this$0  final

  protected boolean patchContext(com.oracle.truffle.api.TruffleLanguageSnippets$Context, com.oracle.truffle.api.TruffleLanguage$Env);
    descriptor: (Lcom/oracle/truffle/api/TruffleLanguageSnippets$Context;Lcom/oracle/truffle/api/TruffleLanguage$Env;)Z
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage this
        start local 1 // com.oracle.truffle.api.TruffleLanguageSnippets$Context context
        start local 2 // com.oracle.truffle.api.TruffleLanguage$Env newEnv
         0: .line 3747
            aload 0 /* this */
            aload 1 /* context */
            aload 2 /* newEnv */
            invokevirtual com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage.optionsAllowPreInitializedContext:(Lcom/oracle/truffle/api/TruffleLanguageSnippets$Context;Lcom/oracle/truffle/api/TruffleLanguage$Env;)Z
            ifne 2
         1: .line 3749
            iconst_0
            ireturn
         2: .line 3751
      StackMap locals:
      StackMap stack:
            aload 1 /* context */
            aload 2 /* newEnv */
            putfield com.oracle.truffle.api.TruffleLanguageSnippets$Context.env:Lcom/oracle/truffle/api/TruffleLanguage$Env;
         3: .line 3752
            aload 1 /* context */
            aload 2 /* newEnv */
            invokevirtual com.oracle.truffle.api.TruffleLanguage$Env.getApplicationArguments:()[Ljava/lang/String;
            putfield com.oracle.truffle.api.TruffleLanguageSnippets$Context.args:[Ljava/lang/String;
         4: .line 3753
            aload 1 /* context */
            aload 2 /* newEnv */
            invokevirtual com.oracle.truffle.api.TruffleLanguage$Env.in:()Ljava/io/InputStream;
            putfield com.oracle.truffle.api.TruffleLanguageSnippets$Context.in:Ljava/io/InputStream;
         5: .line 3754
            aload 1 /* context */
            aload 2 /* newEnv */
            invokevirtual com.oracle.truffle.api.TruffleLanguage$Env.out:()Ljava/io/OutputStream;
            putfield com.oracle.truffle.api.TruffleLanguageSnippets$Context.out:Ljava/io/OutputStream;
         6: .line 3755
            aload 1 /* context */
            aload 2 /* newEnv */
            invokevirtual com.oracle.truffle.api.TruffleLanguage$Env.err:()Ljava/io/OutputStream;
            putfield com.oracle.truffle.api.TruffleLanguageSnippets$Context.err:Ljava/io/OutputStream;
         7: .line 3756
            iconst_1
            ireturn
        end local 2 // com.oracle.truffle.api.TruffleLanguage$Env newEnv
        end local 1 // com.oracle.truffle.api.TruffleLanguageSnippets$Context context
        end local 0 // com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    8     0     this  Lcom/oracle/truffle/api/TruffleLanguageSnippets$PreInitializedLanguage;
            0    8     1  context  Lcom/oracle/truffle/api/TruffleLanguageSnippets$Context;
            0    8     2   newEnv  Lcom/oracle/truffle/api/TruffleLanguage$Env;
    MethodParameters:
         Name  Flags
      context  
      newEnv   

  private boolean optionsAllowPreInitializedContext(com.oracle.truffle.api.TruffleLanguageSnippets$Context, com.oracle.truffle.api.TruffleLanguage$Env);
    descriptor: (Lcom/oracle/truffle/api/TruffleLanguageSnippets$Context;Lcom/oracle/truffle/api/TruffleLanguage$Env;)Z
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=4, args_size=3
        start local 0 // com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage this
        start local 1 // com.oracle.truffle.api.TruffleLanguageSnippets$Context context
        start local 2 // com.oracle.truffle.api.TruffleLanguage$Env newEnv
         0: .line 3762
            aload 2 /* newEnv */
            invokevirtual com.oracle.truffle.api.TruffleLanguage$Env.getOptions:()Lorg/graalvm/options/OptionValues;
            aload 0 /* this */
            getfield com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage.version:Lorg/graalvm/options/OptionKey;
            invokeinterface org.graalvm.options.OptionValues.get:(Lorg/graalvm/options/OptionKey;)Ljava/lang/Object;
            checkcast java.lang.String
            astore 3 /* newVersionValue */
        start local 3 // java.lang.String newVersionValue
         1: .line 3763
            aload 1 /* context */
            getfield com.oracle.truffle.api.TruffleLanguageSnippets$Context.languageVersion:Ljava/lang/String;
            aload 3 /* newVersionValue */
            invokestatic java.util.Objects.equals:(Ljava/lang/Object;Ljava/lang/Object;)Z
            ireturn
        end local 3 // java.lang.String newVersionValue
        end local 2 // com.oracle.truffle.api.TruffleLanguage$Env newEnv
        end local 1 // com.oracle.truffle.api.TruffleLanguageSnippets$Context context
        end local 0 // com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    2     0             this  Lcom/oracle/truffle/api/TruffleLanguageSnippets$PreInitializedLanguage;
            0    2     1          context  Lcom/oracle/truffle/api/TruffleLanguageSnippets$Context;
            0    2     2           newEnv  Lcom/oracle/truffle/api/TruffleLanguage$Env;
            1    2     3  newVersionValue  Ljava/lang/String;
    MethodParameters:
         Name  Flags
      context  
      newEnv   

  protected boolean patchContext(java.lang.Object, com.oracle.truffle.api.TruffleLanguage$Env);
    descriptor: (Ljava/lang/Object;Lcom/oracle/truffle/api/TruffleLanguage$Env;)Z
    flags: (0x1044) ACC_PROTECTED, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            checkcast com.oracle.truffle.api.TruffleLanguageSnippets$Context
            aload 2
            invokevirtual com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage.patchContext:(Lcom/oracle/truffle/api/TruffleLanguageSnippets$Context;Lcom/oracle/truffle/api/TruffleLanguage$Env;)Z
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Lcom/oracle/truffle/api/TruffleLanguage<Lcom/oracle/truffle/api/TruffleLanguageSnippets$Context;>;
SourceFile: "TruffleLanguage.java"
NestHost: com.oracle.truffle.api.TruffleLanguageSnippets
InnerClasses:
  public final Env = com.oracle.truffle.api.TruffleLanguage$Env of com.oracle.truffle.api.TruffleLanguage
  Context = com.oracle.truffle.api.TruffleLanguageSnippets$Context of com.oracle.truffle.api.TruffleLanguageSnippets
  abstract PreInitializedLanguage = com.oracle.truffle.api.TruffleLanguageSnippets$PreInitializedLanguage of com.oracle.truffle.api.TruffleLanguageSnippets