docs: @Override protected boolean calculateIsStructurallySignificant(ASTNode parent) {
  		if (node instanceof TypeDeclaration) return true;
  		if (node instanceof AbstractMethodDeclaration) return true;
  		if (node instanceof FieldDeclaration) return true;
  		if (node instanceof LocalDeclaration) return true;
  		if (node instanceof CompilationUnitDeclaration) return true;
  		return false;
  	}