code: private boolean isIsGetter(AptMethod method) {
          String methodName = method.getName();
  
          if (methodName.length() < 3)
              return false;
  
          if (!methodName.startsWith("is"))
              return false;
  
          if (method.getArgList().length() > 0)
              return false;
  
          if (!"boolean".equals(method.getReturnType()))
              return false;
  
          return true;
      }
docs: Does the method have a Java Beans getter method signature (is varient).
  @param method AptMethod instance.
  @return true if 'is' getter.