# File lib/symetrie_com/acts_as_better_nested_set.rb, line 662
        def leaves_count(scope = {})
          self.class.count_in_nested_set({ :conditions => "#{scope_condition} AND (#{prefixed_left_col_name} BETWEEN #{self[left_col_name]} AND #{self[right_col_name]}) AND #{prefixed_left_col_name} + 1 = #{prefixed_right_col_name}" }, scope)
        end