Part of lp.translations.model
| Function | get_product_name | Get the series' product name, if any. | 
| Class | TranslationNullApprover | Does not approve any files. | 
| Class | TranslationBranchApprover | Automatic approval of template files uploaded from bzr branches. | 
| Class | TranslationBuildApprover | Automatic approval of automatically build translation templates. | 
| Returns | A string; either the product's name or, if productseries
is None, the empty string. | |