<ParameterList name="MueLu">

  <!-- Factory collection -->
  <ParameterList name="Factories">
  </ParameterList>

  <!-- Definition of the multigrid preconditioner -->
  <ParameterList name="Hierarchy">

    <Parameter name="max levels"                            type="int"      value="3"/>
    <Parameter name="coarse: max size"                      type="int"      value="10"/>
    <Parameter name="verbosity"                             type="string"   value="Low"/>

    <ParameterList name="All">
    </ParameterList>
    
    <ParameterList name="DataToWrite">
      <Parameter name="Matrices" type="string" value="{0,1,2}"/>
      <Parameter name="Prolongators" type="string" value="{1,2}"/>
      <Parameter name="Restrictors" type="string" value="{1,2}"/>
    </ParameterList>
  </ParameterList>
</ParameterList>
