https://www.graalvm.org/ 
public interface com.oracle.truffle.nfi.spi.NFIBackendFactory
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.nfi.spi.NFIBackendFactory
  super_class: java.lang.Object
{
  public abstract java.lang.String getBackendId();
    descriptor: ()Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract com.oracle.truffle.nfi.spi.NFIBackend createBackend(com.oracle.truffle.nfi.spi.NFIBackendTools);
    descriptor: (Lcom/oracle/truffle/nfi/spi/NFIBackendTools;)Lcom/oracle/truffle/nfi/spi/NFIBackend;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      tools  
}
SourceFile: "NFIBackendFactory.java"