How to use org.antlr.v4.tool.ast

public String getRuleName() {
  GrammarAST nameNode = (GrammarAST)getChild(0);
  if ( nameNode!=null ) return nameNode.getText();
  return null;
}

  @Override
  public String toString() {
    return label.getText()+" "+type+" "+element.toString();
  }
}

  public CodeBlockForOuterMostAlt(OutputModelFactory factory, Alternative alt) {
    super(factory);
    this.alt = alt;
    altLabel = alt.ast.altLabel!=null ? alt.ast.altLabel.getText() : null;
  }
}

public CommonTree getFirstDescendantWithType(int type) {
  if ( getType()==type ) return this;
  if ( children==null ) return null;
  for (Object c : children) {
    GrammarAST t = (GrammarAST)c;
    if ( t.getType()==type ) return t;
    CommonTree d = t.getFirstDescendantWithType(type);
    if ( d!=null ) return d;
  }
  return null;
}

@Override
public Object dupNode(Object t) {
  if ( t==null ) return null;
  return ((GrammarAST)t).dupNode(); //create(((GrammarAST)t).token);
}

public AltAST getOutermostAltNode() {
  if ( this instanceof AltAST && parent.parent instanceof RuleAST ) {
    return (AltAST)this;
  }
  if ( parent!=null ) return ((GrammarAST)parent).getOutermostAltNode();
  return null;
}

@Override
public GrammarAST dupNode() {
  return new GrammarAST(this);
}

@Override
public SetAST dupNode() {
  return new SetAST(this);
}

  @Override
  public Object errorNode(org.antlr.runtime.TokenStream input, org.antlr.runtime.Token start, org.antlr.runtime.Token stop,
              org.antlr.runtime.RecognitionException e)
  {
    return new GrammarASTErrorNode(input, start, stop, e);
  }
}

public String getRuleName() {
  GrammarAST nameNode = (GrammarAST)getChild(0);
  if ( nameNode!=null ) return nameNode.getText();
  return null;
}

public CommonTree getFirstDescendantWithType(int type) {
  if ( getType()==type ) return this;
  if ( children==null ) return null;
  for (Object c : children) {
    GrammarAST t = (GrammarAST)c;
    if ( t.getType()==type ) return t;
    CommonTree d = t.getFirstDescendantWithType(type);
    if ( d!=null ) return d;
  }
  return null;
}

  @Override
  public String toString() {
    return label.getText()+" "+type+" "+element.toString();
  }
}

  public CodeBlockForOuterMostAlt(OutputModelFactory factory, Alternative alt) {
    super(factory);
    this.alt = alt;
    altLabel = alt.ast.altLabel!=null ? alt.ast.altLabel.getText() : null;
  }
}

@Override
public GrammarAST dupNode(Object t) {
  if ( t==null ) return null;
  return ((GrammarAST)t).dupNode(); //create(((GrammarAST)t).token);
}

public AltAST getOutermostAltNode() {
  if ( this instanceof AltAST && parent.parent instanceof RuleAST ) {
    return (AltAST)this;
  }
  if ( parent!=null ) return ((GrammarAST)parent).getOutermostAltNode();
  return null;
}

public String getRuleName() {
  GrammarAST nameNode = (GrammarAST)getChild(0);
  if ( nameNode!=null ) return nameNode.getText();
  return null;
}

public CommonTree getFirstDescendantWithType(int type) {
  if ( getType()==type ) return this;
  if ( children==null ) return null;
  for (Object c : children) {
    GrammarAST t = (GrammarAST)c;
    if ( t.getType()==type ) return t;
    CommonTree d = t.getFirstDescendantWithType(type);
    if ( d!=null ) return d;
  }
  return null;
}

  public CodeBlockForOuterMostAlt(OutputModelFactory factory, Alternative alt) {
    super(factory);
    this.alt = alt;
    altLabel = alt.ast.altLabel!=null ? alt.ast.altLabel.getText() : null;
  }
}

public String getRuleName() {
  GrammarAST nameNode = (GrammarAST)getChild(0);
  if ( nameNode!=null ) return nameNode.getText();
  return null;
}

public String getRuleName() {
  GrammarAST nameNode = (GrammarAST)getChild(0);
  if ( nameNode!=null ) return nameNode.getText();
  return null;
}