code: def generate_pdfa(
      pdf_pages: list[Path],
      pdfmark: Path,
      output_file: Path,
      context: PdfContext,
      pdf_version: str,
      pdfa_part: str,
      progressbar_class: type[ProgressBar] | None,
      stop_on_soft_error: bool,
  ) -> Path:
      """Generate a PDF/A.
  
      This API strongly assumes a PDF/A generator with Ghostscript's semantics.
  
      OCRmyPDF will modify the metadata and possibly linearize the PDF/A after it
      is generated.
  
      Arguments:
          pdf_pages: A list of one or more filenames, will be merged into output_file.
          pdfmark: A PostScript file intended for Ghostscript with details on
              how to perform the PDF/A conversion.
          output_file: The name of the desired output file.
          context: The current context.
          pdf_version: The minimum PDF version that the output file should be.
              At its own discretion, the PDF/A generator may raise the version,
              but should not lower it.
          pdfa_part: The desired PDF/A compliance level, such as ``'2B'``.
          progressbar_class: The class of a progress bar, which must implement
              the ProgressBar protocol. If None, no progress is reported.
          stop_on_soft_error: If there is an "soft error" such that PDF/A generation
              can proceed and produce a valid PDF/A, but output may be invalid or
              may not visually resemble the original, the implementer of this hook
              should raise a detailed exception. If ``False``, continue processing
              and report by logging it. If the hook cannot proceed, it should always
              raise an exception, regardless of this setting.
  
      Returns:
          Path: If successful, the hook should return ``output_file``.
  
      Note:
          This is a :ref:`firstresult hook<firstresult>`.
  
      Note:
          Before version 15.0.0, the ``context`` was not provided and ``compression``
          was provided instead. Plugins should now read the context object to determine
          if compression is requested.
      """
  
imports: from __future__ import annotations
  from abc import ABC, abstractmethod
  from argparse import ArgumentParser, Namespace
  from collections.abc import Sequence, Set
  from logging import Handler
  from pathlib import Path
  from typing import TYPE_CHECKING, NamedTuple
  import pluggy
  from ocrmypdf import Executor, PdfContext
  from ocrmypdf._progressbar import ProgressBar
  from ocrmypdf.helpers import Resolution
label_desc: Use image node_id 13 for calling a global function with example usage: generate_pdfa(pdf_pages, pdfmark, output_file, context, pdf_version, pdfa_part, progressbar_class, stop_on_soft_error) without return types