text: # Copyright (c) 2019 - The Procedural Generation for Gazebo authors
  # For information on the respective copyright owner see the NOTICE file
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from ..types import XMLScalar
  
  
  class ViscousFriction(XMLScalar):
      _NAME = 'viscous_friction'
      _TYPE = 'sdf'
  
      def __init__(self, default=0):
          super(ViscousFriction, self).__init__(
              default, min_value=0)
  