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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def dependencies(self) -> List[Dependency]: """Return the PB dependencies."""

        dependencies_str = DB.get_hash_value(self.key, 'dependencies')
        dependencies = []
        for dependency in ast.literal_eval(dependencies_str):
            dependencies.append(Dependency(dependency))
        return dependencies