code: def create_coef_dict(
      coefs_nominal, coefs_gsics, radiance_type, ext_coefs
  ):
      """Create coefficient dictionary expected by calibration class."""
      return {
          "coefs": {
              "NOMINAL": {
                  "gain": coefs_nominal[0],
                  "offset": coefs_nominal[1],
              },
              "GSICS": {
                  "gain": coefs_gsics[0],
                  "offset": coefs_gsics[1],
              },
              "EXTERNAL": ext_coefs,
          },
          "radiance_type": radiance_type,
      }
  
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 10 for calling a global function with example usage: create_coef_dict(coefs_nominal, coefs_gsics, radiance_type, ext_coefs) and returns: dict