text: or Microsoft Outlook (.msg) files.Using Unstructuredâ€‹#!pip install unstructuredfrom langchain.document_loaders import UnstructuredEmailLoaderloader = UnstructuredEmailLoader("example_data/fake-email.eml")data = loader.load()data    [Document(page_content='This is a test email to use for unit tests.\n\nImportant points:\n\nRoses are red\n\nViolets are blue', metadata={'source': 'example_data/fake-email.eml'})]Retain Elementsâ€‹Under the hood, Unstructured creates different "elements" for different chunks of text. By default we combine those together, but you can easily keep that separation by specifying mode="elements".loader = UnstructuredEmailLoader("example_data/fake-email.eml", mode="elements")data = loader.load()data[0]    Document(page_content='This is a test email to use for unit tests.', metadata={'source': 'example_data/fake-email.eml', 'filename': 'fake-email.eml', 'file_directory': 'example_data', 'date': '2022-12-16T17:04:16-05:00', 'filetype': 'message/rfc822', 'sent_from': ['Matthew Robinson <mrobinson@unstructured.io>'], 'sent_to': ['Matthew Robinson <mrobinson@unstructured.io>'], 'subject': 'Test Email', 'category': 'NarrativeText'})Processing Attachmentsâ€‹You can process attachments with UnstructuredEmailLoader by setting process_attachments=True in the constructor. By default, attachments will be partitioned using the partition function from unstructured. You can use a different partitioning function by passing the function to the attachment_partitioner kwarg.loader = UnstructuredEmailLoader(    "example_data/fake-email.eml",    mode="elements",    process_attachments=True,)data =