def _import_types():
    global Page
    from pdftools_sdk.image.page import Page
    global PageList
    from pdftools_sdk.image.page_list import PageList
    global Document
    from pdftools_sdk.image.document import Document
    global SinglePageDocument
    from pdftools_sdk.image.single_page_document import SinglePageDocument
    global MultiPageDocument
    from pdftools_sdk.image.multi_page_document import MultiPageDocument
    global DocumentList
    from pdftools_sdk.image.document_list import DocumentList

