https://openjdk.java.net/ 
public interface com.sun.source.tree.BlockTree extends com.sun.source.tree.StatementTree
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.source.tree.BlockTree
  super_class: java.lang.Object
{
  public abstract boolean isStatic();
    descriptor: ()Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract java.util.List<? extends com.sun.source.tree.StatementTree> getStatements();
    descriptor: ()Ljava/util/List;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/List<+Lcom/sun/source/tree/StatementTree;>;
}
SourceFile: "BlockTree.java"