<?xml version="1.0"?>
<sdf version="1.5">
  <world name="default">

    <include>
      <uri>model://ground_plane</uri>
    </include>

    <include>
      <uri>model://sun</uri>
    </include>

    <include>
      <uri>model://mass_on_rails</uri>
      <plugin name="gravity_compensation" filename="libGravityCompensationPlugin.so">
        <uri>model://mass_on_rails</uri>
      </plugin>
    </include>

  </world>
</sdf>
