B3j0f.requester

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- fix docstrings.
- fix wrong name from obj2driver.
- fix copy of function.
- enhance use of params.
- fix updatename.

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- add translator factory in order to set the right translator for the right expression.

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- support for groupby.
- add main object definition in the main package.
- add translator in the crudannotation.

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- library creation.