text: """Button demo view models"""
  from pyviews.core import ObservableEntity
  
  
  class CounterViewModel(ObservableEntity):
      """Counter button view model"""
  
      def __init__(self):
          super().__init__()
          self.count = 0
  
      def add_count(self):
          """Adds 1 to count"""
          self.count = self.count + 1
  