https://openjdk.java.net/ 
public interface com.sun.source.util.SourcePositions
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.source.util.SourcePositions
  super_class: java.lang.Object
{
  public abstract long getStartPosition(com.sun.source.tree.CompilationUnitTree, com.sun.source.tree.Tree);
    descriptor: (Lcom/sun/source/tree/CompilationUnitTree;Lcom/sun/source/tree/Tree;)J
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      file  
      tree  

  public abstract long getEndPosition(com.sun.source.tree.CompilationUnitTree, com.sun.source.tree.Tree);
    descriptor: (Lcom/sun/source/tree/CompilationUnitTree;Lcom/sun/source/tree/Tree;)J
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      file  
      tree  
}
SourceFile: "SourcePositions.java"