docs: public static boolean isSymmetric(DMatrixRMaj m , double tol ) {
          if( m.numCols != m.numRows )
              return false;
  
          double max = CommonOps_DDRM.elementMaxAbs(m);
  
          for( int i = 0; i < m.numRows; i++ ) {
              for( int j = 0; j < i; j++ ) {
                  double a = m.get(i,j)/max;
                  double b = m.get(j,i)/max;
  
                  double diff = Math.abs(a-b);
  
                  if( !(diff <= tol) ) {
                      return false;
                  }
              }
          }
          return true;
      }