61 back door for exiting with na time

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 :warning:

Comparison is base (93564ca) 50.41% compared to head (aa266d2) 50.40%.

:exclamation: Current head aa266d2 differs from pull request most recent head 4745039. Consider uploading reports for the commit 4745039 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #62 +/- ## ========================================== - Coverage 50.41% 50.40% -0.01% ========================================== Files 57 57 Lines 11912 11913 +1 ========================================== Hits 6005 6005 - Misses 5907 5908 +1 ``` | [Impacted Files](https://app.codecov.io/gh/nlmixr2/rxode2parse/pull/62?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nlmixr2) | Coverage Δ | | |---|---|---| | [inst/include/rxode2parseGetTime.h](https://app.codecov.io/gh/nlmixr2/rxode2parse/pull/62?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nlmixr2#diff-aW5zdC9pbmNsdWRlL3J4b2RlMnBhcnNlR2V0VGltZS5o) | `0.00% <0.00%> (ø)` | | | [inst/include/rxode2parseStruct.h](https://app.codecov.io/gh/nlmixr2/rxode2parse/pull/62?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nlmixr2#diff-aW5zdC9pbmNsdWRlL3J4b2RlMnBhcnNlU3RydWN0Lmg=) | `100.00% <ø> (ø)` | |

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