https://www.graalvm.org/ 
final class com.oracle.truffle.nfi.NFIContext
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.nfi.NFIContext
  super_class: java.lang.Object
{
  com.oracle.truffle.api.TruffleLanguage$Env env;
    descriptor: Lcom/oracle/truffle/api/TruffleLanguage$Env;
    flags: (0x0000) 

  final org.graalvm.collections.EconomicMap<java.lang.String, com.oracle.truffle.nfi.API> apiCache;
    descriptor: Lorg/graalvm/collections/EconomicMap;
    flags: (0x0010) ACC_FINAL
    Signature: Lorg/graalvm/collections/EconomicMap<Ljava/lang/String;Lcom/oracle/truffle/nfi/API;>;

  void <init>(com.oracle.truffle.api.TruffleLanguage$Env);
    descriptor: (Lcom/oracle/truffle/api/TruffleLanguage$Env;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.nfi.NFIContext this
        start local 1 // com.oracle.truffle.api.TruffleLanguage$Env env
         0: .line 71
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 69
            aload 0 /* this */
            invokestatic org.graalvm.collections.EconomicMap.create:()Lorg/graalvm/collections/EconomicMap;
            putfield com.oracle.truffle.nfi.NFIContext.apiCache:Lorg/graalvm/collections/EconomicMap;
         2: .line 72
            aload 0 /* this */
            aload 1 /* env */
            putfield com.oracle.truffle.nfi.NFIContext.env:Lcom/oracle/truffle/api/TruffleLanguage$Env;
         3: .line 73
            return
        end local 1 // com.oracle.truffle.api.TruffleLanguage$Env env
        end local 0 // com.oracle.truffle.nfi.NFIContext this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lcom/oracle/truffle/nfi/NFIContext;
            0    4     1   env  Lcom/oracle/truffle/api/TruffleLanguage$Env;
    MethodParameters:
      Name  Flags
      env   

  void patch(com.oracle.truffle.api.TruffleLanguage$Env);
    descriptor: (Lcom/oracle/truffle/api/TruffleLanguage$Env;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.nfi.NFIContext this
        start local 1 // com.oracle.truffle.api.TruffleLanguage$Env newEnv
         0: .line 76
            aload 0 /* this */
            aload 1 /* newEnv */
            putfield com.oracle.truffle.nfi.NFIContext.env:Lcom/oracle/truffle/api/TruffleLanguage$Env;
         1: .line 77
            aload 0 /* this */
            getfield com.oracle.truffle.nfi.NFIContext.apiCache:Lorg/graalvm/collections/EconomicMap;
            invokeinterface org.graalvm.collections.EconomicMap.clear:()V
         2: .line 78
            return
        end local 1 // com.oracle.truffle.api.TruffleLanguage$Env newEnv
        end local 0 // com.oracle.truffle.nfi.NFIContext this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    3     0    this  Lcom/oracle/truffle/nfi/NFIContext;
            0    3     1  newEnv  Lcom/oracle/truffle/api/TruffleLanguage$Env;
    MethodParameters:
        Name  Flags
      newEnv  

  com.oracle.truffle.nfi.spi.NFIBackend getBackend(java.lang.String);
    descriptor: (Ljava/lang/String;)Lcom/oracle/truffle/nfi/spi/NFIBackend;
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.nfi.NFIContext this
        start local 1 // java.lang.String id
         0: .line 81
            aload 0 /* this */
            aload 1 /* id */
            invokevirtual com.oracle.truffle.nfi.NFIContext.getAPI:(Ljava/lang/String;)Lcom/oracle/truffle/nfi/API;
            getfield com.oracle.truffle.nfi.API.backend:Lcom/oracle/truffle/nfi/spi/NFIBackend;
            areturn
        end local 1 // java.lang.String id
        end local 0 // com.oracle.truffle.nfi.NFIContext this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/nfi/NFIContext;
            0    1     1    id  Ljava/lang/String;
    MethodParameters:
      Name  Flags
      id    

  com.oracle.truffle.nfi.API getAPI(java.lang.String);
    descriptor: (Ljava/lang/String;)Lcom/oracle/truffle/nfi/API;
    flags: (0x0000) 
    Code:
      stack=4, locals=9, args_size=2
        start local 0 // com.oracle.truffle.nfi.NFIContext this
        start local 1 // java.lang.String backendId
         0: .line 86
            aload 0 /* this */
            getfield com.oracle.truffle.nfi.NFIContext.apiCache:Lorg/graalvm/collections/EconomicMap;
            aload 1 /* backendId */
            invokeinterface org.graalvm.collections.EconomicMap.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast com.oracle.truffle.nfi.API
            astore 2 /* ret */
        start local 2 // com.oracle.truffle.nfi.API ret
         1: .line 87
            aload 2 /* ret */
            ifnull 3
         2: .line 88
            aload 2 /* ret */
            areturn
         3: .line 91
      StackMap locals: com.oracle.truffle.nfi.API
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.nfi.NFIContext.apiCache:Lorg/graalvm/collections/EconomicMap;
            dup
            astore 3
            monitorenter
         4: .line 92
            aload 0 /* this */
            getfield com.oracle.truffle.nfi.NFIContext.apiCache:Lorg/graalvm/collections/EconomicMap;
            aload 1 /* backendId */
            invokeinterface org.graalvm.collections.EconomicMap.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast com.oracle.truffle.nfi.API
            astore 2 /* ret */
         5: .line 93
            aload 2 /* ret */
            ifnull 8
         6: .line 94
            aload 2 /* ret */
            aload 3
            monitorexit
         7: areturn
         8: .line 97
      StackMap locals: org.graalvm.collections.EconomicMap
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.nfi.NFIContext.env:Lcom/oracle/truffle/api/TruffleLanguage$Env;
            invokevirtual com.oracle.truffle.api.TruffleLanguage$Env.getInternalLanguages:()Ljava/util/Map;
            invokeinterface java.util.Map.values:()Ljava/util/Collection;
            invokeinterface java.util.Collection.iterator:()Ljava/util/Iterator;
            astore 5
            goto 20
      StackMap locals: com.oracle.truffle.nfi.NFIContext java.lang.String com.oracle.truffle.nfi.API org.graalvm.collections.EconomicMap top java.util.Iterator
      StackMap stack:
         9: aload 5
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast com.oracle.truffle.api.nodes.LanguageInfo
            astore 4 /* language */
        start local 4 // com.oracle.truffle.api.nodes.LanguageInfo language
        10: .line 98
            ldc "nfi"
            aload 4 /* language */
            invokevirtual com.oracle.truffle.api.nodes.LanguageInfo.getId:()Ljava/lang/String;
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 12
        11: .line 99
            goto 20
        12: .line 102
      StackMap locals: com.oracle.truffle.nfi.NFIContext java.lang.String com.oracle.truffle.nfi.API org.graalvm.collections.EconomicMap com.oracle.truffle.api.nodes.LanguageInfo java.util.Iterator
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.truffle.nfi.NFIContext.env:Lcom/oracle/truffle/api/TruffleLanguage$Env;
            aload 4 /* language */
            ldc Lcom/oracle/truffle/nfi/spi/NFIBackendFactory;
            invokevirtual com.oracle.truffle.api.TruffleLanguage$Env.lookup:(Lcom/oracle/truffle/api/nodes/LanguageInfo;Ljava/lang/Class;)Ljava/lang/Object;
            checkcast com.oracle.truffle.nfi.spi.NFIBackendFactory
            astore 6 /* backendFactory */
        start local 6 // com.oracle.truffle.nfi.spi.NFIBackendFactory backendFactory
        13: .line 103
            aload 6 /* backendFactory */
            ifnull 20
            aload 6 /* backendFactory */
            invokeinterface com.oracle.truffle.nfi.spi.NFIBackendFactory.getBackendId:()Ljava/lang/String;
            aload 1 /* backendId */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 20
        14: .line 105
            aload 0 /* this */
            getfield com.oracle.truffle.nfi.NFIContext.env:Lcom/oracle/truffle/api/TruffleLanguage$Env;
            aload 4 /* language */
            invokevirtual com.oracle.truffle.api.TruffleLanguage$Env.initializeLanguage:(Lcom/oracle/truffle/api/nodes/LanguageInfo;)Z
            pop
        15: .line 107
            aload 6 /* backendFactory */
            new com.oracle.truffle.nfi.NFIContext$NFIBackendToolsImpl
            dup
            aload 1 /* backendId */
            invokespecial com.oracle.truffle.nfi.NFIContext$NFIBackendToolsImpl.<init>:(Ljava/lang/String;)V
            invokeinterface com.oracle.truffle.nfi.spi.NFIBackendFactory.createBackend:(Lcom/oracle/truffle/nfi/spi/NFIBackendTools;)Lcom/oracle/truffle/nfi/spi/NFIBackend;
            astore 7 /* backend */
        start local 7 // com.oracle.truffle.nfi.spi.NFIBackend backend
        16: .line 108
            new com.oracle.truffle.nfi.API
            dup
            aload 1 /* backendId */
            aload 7 /* backend */
            invokespecial com.oracle.truffle.nfi.API.<init>:(Ljava/lang/String;Lcom/oracle/truffle/nfi/spi/NFIBackend;)V
            astore 8 /* api */
        start local 8 // com.oracle.truffle.nfi.API api
        17: .line 109
            aload 0 /* this */
            getfield com.oracle.truffle.nfi.NFIContext.apiCache:Lorg/graalvm/collections/EconomicMap;
            aload 6 /* backendFactory */
            invokeinterface com.oracle.truffle.nfi.spi.NFIBackendFactory.getBackendId:()Ljava/lang/String;
            aload 8 /* api */
            invokeinterface org.graalvm.collections.EconomicMap.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        18: .line 110
            aload 8 /* api */
            aload 3
            monitorexit
        19: areturn
        end local 8 // com.oracle.truffle.nfi.API api
        end local 7 // com.oracle.truffle.nfi.spi.NFIBackend backend
        end local 6 // com.oracle.truffle.nfi.spi.NFIBackendFactory backendFactory
        end local 4 // com.oracle.truffle.api.nodes.LanguageInfo language
        20: .line 97
      StackMap locals: com.oracle.truffle.nfi.NFIContext java.lang.String com.oracle.truffle.nfi.API org.graalvm.collections.EconomicMap top java.util.Iterator
      StackMap stack:
            aload 5
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 9
        21: .line 91
            aload 3
            monitorexit
        22: goto 25
      StackMap locals: com.oracle.truffle.nfi.NFIContext java.lang.String com.oracle.truffle.nfi.API org.graalvm.collections.EconomicMap
      StackMap stack: java.lang.Throwable
        23: aload 3
            monitorexit
        24: athrow
        25: .line 115
      StackMap locals:
      StackMap stack:
            aconst_null
            areturn
        end local 2 // com.oracle.truffle.nfi.API ret
        end local 1 // java.lang.String backendId
        end local 0 // com.oracle.truffle.nfi.NFIContext this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0   26     0            this  Lcom/oracle/truffle/nfi/NFIContext;
            0   26     1       backendId  Ljava/lang/String;
            1   26     2             ret  Lcom/oracle/truffle/nfi/API;
           10   20     4        language  Lcom/oracle/truffle/api/nodes/LanguageInfo;
           13   20     6  backendFactory  Lcom/oracle/truffle/nfi/spi/NFIBackendFactory;
           16   20     7         backend  Lcom/oracle/truffle/nfi/spi/NFIBackend;
           17   20     8             api  Lcom/oracle/truffle/nfi/API;
      Exception table:
        from    to  target  type
           4     7      23  any
           8    19      23  any
          20    22      23  any
          23    24      23  any
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.CompilerDirectives$TruffleBoundary()
    MethodParameters:
           Name  Flags
      backendId  
}
SourceFile: "NFIContext.java"
NestMembers:
  com.oracle.truffle.nfi.NFIContext$NFIBackendToolsImpl
InnerClasses:
  public abstract TruffleBoundary = com.oracle.truffle.api.CompilerDirectives$TruffleBoundary of com.oracle.truffle.api.CompilerDirectives
  public final Env = com.oracle.truffle.api.TruffleLanguage$Env of com.oracle.truffle.api.TruffleLanguage
  private final NFIBackendToolsImpl = com.oracle.truffle.nfi.NFIContext$NFIBackendToolsImpl of com.oracle.truffle.nfi.NFIContext