class ASTSignatureComparator implements SignatureComparator {

  @Override
  public SignatureChange computeChange(Signature _a, Signature _b) {
    SignatureChange astChange = new ASTSignatureChange(_a, _b);
    astChange.getModifications();
    return astChange;
  }

  public  ASTSignatureComparator();
  public  ASTSignatureComparator(double stringSimilarity);

}