in import_optional_dependency module = importlib.import_module(name)

As an AI language model, I need more context to provide a specific answer. However, I can provide some general information about the `import_optional_dependency` function and the `importlib` module.

`import_optional_dependency` is a function that is commonly used in Python packages to import optional dependencies. This function checks if a module is installed and if it is not, it raises an ImportError with an informative message. If the module is installed, it imports it using the `importlib` module.

`importlib` is a module in Python that provides a way to programmatically import modules. It is used to load modules dynamically at runtime, which can be useful for building modular applications.

The `import_module` function in `importlib` is used to import a module by name. It takes a string argument that specifies the name of the module to be imported and returns a reference to the imported module.

In summary, the `import_optional_dependency` function uses the `importlib` module to dynamically import optional dependencies. When a module is imported, the `import_module` function is used to load the module by name.