<ParameterList name="MueLu">
  <Parameter name="verbosity" type="string" value="high"/>
  
  <Parameter name="max levels" type="int" value="10"/>
  <Parameter name="coarse: max size" type="int" value="50"/>
  
  <Parameter name="multigrid algorithm" type="string" value="sa"/>
  <Parameter name="problem: symmetric" type="bool" value="true"/>
  <Parameter name="transpose: use implicit" type="bool" value="true"/>
  
  <Parameter name="aggregation: type" type="string" value="uncoupled"/>
  <Parameter name="aggregation: drop scheme" type="string" value="classical"/>
  <Parameter name="aggregation: min agg size" type="int" value="8"/>
  <Parameter name="aggregation: max agg size" type="int" value="10"/>
  
  <Parameter name="smoother: type" type="string" value="RELAXATION"/>
  <ParameterList name="smoother: params">
    <Parameter name="relaxation: type" type="string" value="Symmetric Gauss-Seidel"/>
    <Parameter name="relaxation: sweeps" type="int" value="2"/>
    <Parameter name="relaxation: damping factor" type="double" value="1.0"/>
  </ParameterList>
</ParameterList>