public boolean isMethodSignatureExists() {
    PsiClass target = myTargetMethod.getContainingClass();
    LOG.assertTrue(target != null);
    PsiMethod[] methods = target.findMethodsByName(myTargetMethod.getName(), false);
    for (PsiMethod method : methods) {
      if (PsiUtil.isApplicable(method, PsiSubstitutor.EMPTY, myExpressions)) return true;
    }
    return false;
  }
public boolean isMethodSignatureExists()