code: def is_mosaic(csa_dict):
      """Return True if the data is of Mosaic type
  
      Parameters
      ----------
      csa_dict : dict
         dict containing read CSA data
  
      Returns
      -------
      tf : bool
         True if the `dcm_data` appears to be of Siemens mosaic type,
         False otherwise
      """
      if csa_dict is None:
          return False
      if get_acq_mat_txt(csa_dict) is None:
          return False
      n_o_m = get_n_mosaic(csa_dict)
      return not (n_o_m is None) and n_o_m != 0
  
file_path: nibabel/nibabel/nicom/csareader.py
imports: import numpy
  from .structreader import Unpacker
  from .utils import find_private_section
label_desc: Use image node_id 5 for calling a global function with example usage: is_mosaic(csa_dict) and returns: unknown, False, False