Functor computing the natural ordering (identity)
| StorageIndex | The type of indices of the matrix | 
| template<typename MatrixType > | |
| void | operator() (const MatrixType &, PermutationType &perm) | 
| 
 | inline | 
Compute the permutation vector from a column-major sparse matrix
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Licensed under the MPL2 License.
    https://eigen.tuxfamily.org/dox/classEigen_1_1NaturalOrdering.html