Observer bind with use case

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (8270906) 100.00% compared to head (477225b) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #150 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 73 73 Lines 1400 1410 +10 ========================================= + Hits 1400 1410 +10 ``` | [Impacted Files](https://app.codecov.io/gh/AcmeSoftwareLLC/clean_framework/pull/150?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AcmeSoftwareLLC) | Coverage Δ | | |---|---|---| | [.../clean\_framework/lib/src/core/gateway/gateway.dart](https://app.codecov.io/gh/AcmeSoftwareLLC/clean_framework/pull/150?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AcmeSoftwareLLC#diff-cGFja2FnZXMvY2xlYW5fZnJhbWV3b3JrL2xpYi9zcmMvY29yZS9nYXRld2F5L2dhdGV3YXkuZGFydA==) | `100.00% <100.00%> (ø)` | | | [...lean\_framework/lib/src/core/use\_case/use\_case.dart](https://app.codecov.io/gh/AcmeSoftwareLLC/clean_framework/pull/150?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AcmeSoftwareLLC#diff-cGFja2FnZXMvY2xlYW5fZnJhbWV3b3JrL2xpYi9zcmMvY29yZS91c2VfY2FzZS91c2VfY2FzZS5kYXJ0) | `100.00% <100.00%> (ø)` | | | [...ges/clean\_framework/lib/src/providers/gateway.dart](https://app.codecov.io/gh/AcmeSoftwareLLC/clean_framework/pull/150?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AcmeSoftwareLLC#diff-cGFja2FnZXMvY2xlYW5fZnJhbWV3b3JrL2xpYi9zcmMvcHJvdmlkZXJzL2dhdGV3YXkuZGFydA==) | `100.00% <100.00%> (ø)` | | | [...rk/lib/src/utilities/clean\_framework\_observer.dart](https://app.codecov.io/gh/AcmeSoftwareLLC/clean_framework/pull/150?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AcmeSoftwareLLC#diff-cGFja2FnZXMvY2xlYW5fZnJhbWV3b3JrL2xpYi9zcmMvdXRpbGl0aWVzL2NsZWFuX2ZyYW1ld29ya19vYnNlcnZlci5kYXJ0) | `100.00% <100.00%> (ø)` | |

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