This function is used by coxme. When a random effect is expressed as a sum of variance terms (matrices), it is important that all of them have the same row/column order and the same block structure. This does so, while retaining as much sparsity in the result as possible.

1 | ```
bdsmatrix.reconcile(varlist, group)
``` |

`varlist` |
a list, each element of which is a matrix or bdsmatrix object |

`group` |
a vector of dimnames, the target match for matrice's dimnames |

a varlist, whose individual elements may have had row/column rearrangment.

Terry Therneau

`bdsmatrix`

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