def _import_types():
    global CustomTextVariableMap
    from pdftools_sdk.sign.custom_text_variable_map import CustomTextVariableMap
    global Appearance
    from pdftools_sdk.sign.appearance import Appearance
    global SignatureConfiguration
    from pdftools_sdk.sign.signature_configuration import SignatureConfiguration
    global TimestampConfiguration
    from pdftools_sdk.sign.timestamp_configuration import TimestampConfiguration
    global OutputOptions
    from pdftools_sdk.sign.output_options import OutputOptions
    global MdpPermissionOptions
    from pdftools_sdk.sign.mdp_permission_options import MdpPermissionOptions
    global SignatureFieldOptions
    from pdftools_sdk.sign.signature_field_options import SignatureFieldOptions
    global PreparedDocument
    from pdftools_sdk.sign.prepared_document import PreparedDocument
    global Signer
    from pdftools_sdk.sign.signer import Signer

    global WarningCategory
    from pdftools_sdk.sign.warning_category import WarningCategory
    global SignatureRemoval
    from pdftools_sdk.sign.signature_removal import SignatureRemoval
    global AddValidationInformation
    from pdftools_sdk.sign.add_validation_information import AddValidationInformation

