https://www.graalvm.org/ 
public interface org.graalvm.tools.api.lsp.LSPServerAccessor
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.graalvm.tools.api.lsp.LSPServerAccessor
  super_class: java.lang.Object
{
  public abstract java.util.Map<java.net.URI, java.lang.String> getOpenFileURI2LangId();
    descriptor: ()Ljava/util/Map;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/Map<Ljava/net/URI;Ljava/lang/String;>;

  public abstract void sendCustomNotification(java.lang.String, java.lang.Object);
    descriptor: (Ljava/lang/String;Ljava/lang/Object;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      method  
      params  

  public abstract com.oracle.truffle.api.source.Source getSource(java.net.URI);
    descriptor: (Ljava/net/URI;)Lcom/oracle/truffle/api/source/Source;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      uri   
}
SourceFile: "LSPServerAccessor.java"