docs: public static CholeskyDecomposition_F64<DMatrixRMaj> chol(int matrixSize , boolean lower )
      {
          if( matrixSize < EjmlParameters.SWITCH_BLOCK64_CHOLESKY ) {
              return new CholeskyDecompositionInner_DDRM(lower);
          } else if( EjmlParameters.MEMORY == EjmlParameters.MemoryUsage.FASTER ){
              return new CholeskyDecomposition_DDRB_to_DDRM(lower);
          } else {
              return new CholeskyDecompositionBlock_DDRM(EjmlParameters.BLOCK_WIDTH_CHOL);
          }
      }