docs: public static DEigenpair dominantEigenpair(DMatrixRMaj A ) {
  
          EigenPowerMethod_DDRM power = new EigenPowerMethod_DDRM(A.numRows);
  
          // eh maybe 0.1 is a good value.  who knows.
          if( !power.computeShiftInvert(A,0.1) )
              return null;
  
          return null;//power.getEigenVector();
      }