code: def order(self):
      return self._order
  
file_path: mars/mars/tensor/datasource/eye.py
imports: import numpy
  from ...None import opcodes
  from ...serialization.serializables import Int32Field, StringField
  from ...config import options
  from ..utils import decide_chunk_sizes, get_order
  from .diag import TensorDiagBase
  from .core import TensorNoInput
  from ...lib import sparse
  from ..array_utils import create_array
label_desc: Use image node_id 3 for calling the TensorEye obj's underlying member method code with example usage: obj.order() and returns: self