code: def add_scanline_acq_time(dataset, acq_time):
      """Add scanline acquisition time to the given dataset."""
      dataset.coords["acq_time"] = ("y", acq_time)
      dataset.coords["acq_time"].attrs[
          "long_name"
      ] = "Mean scanline acquisition time"
  
imports: from __future__ import annotations
  import warnings
  from datetime import datetime, timedelta
  import dask.array
  import numpy
  import pyproj
  from numpy.polynomial.chebyshev import Chebyshev
  from satpy.readers.eum_base import issue_revision, time_cds_short
  from satpy.readers.utils import apply_earthsun_distance_correction
  from satpy.utils import get_legacy_chunk_size
label_desc: Use image node_id 4 for calling a global function with example usage: add_scanline_acq_time(dataset, acq_time) without return types