def _import_types():
    global MetadataSettings
    from pdftools_sdk.pdf.metadata_settings import MetadataSettings
    global Encryption
    from pdftools_sdk.pdf.encryption import Encryption
    global OutputOptions
    from pdftools_sdk.pdf.output_options import OutputOptions
    global Document
    from pdftools_sdk.pdf.document import Document
    global Metadata
    from pdftools_sdk.pdf.metadata import Metadata
    global SignatureField
    from pdftools_sdk.pdf.signature_field import SignatureField
    global UnsignedSignatureField
    from pdftools_sdk.pdf.unsigned_signature_field import UnsignedSignatureField
    global SignedSignatureField
    from pdftools_sdk.pdf.signed_signature_field import SignedSignatureField
    global Signature
    from pdftools_sdk.pdf.signature import Signature
    global DocumentSignature
    from pdftools_sdk.pdf.document_signature import DocumentSignature
    global CertificationSignature
    from pdftools_sdk.pdf.certification_signature import CertificationSignature
    global DocumentTimestamp
    from pdftools_sdk.pdf.document_timestamp import DocumentTimestamp
    global SignatureFieldList
    from pdftools_sdk.pdf.signature_field_list import SignatureFieldList
    global Revision
    from pdftools_sdk.pdf.revision import Revision

    global Permission
    from pdftools_sdk.pdf.permission import Permission
    global XfaType
    from pdftools_sdk.pdf.xfa_type import XfaType
    global MdpPermissions
    from pdftools_sdk.pdf.mdp_permissions import MdpPermissions
    global Conformance
    from pdftools_sdk.pdf.conformance import Conformance

