code: def get_origin_shape(
      self,
  ):
      return self.origin_shape_list
  
imports: import numpy
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from ppdet.core.workspace import register
  from ppdet.modeling.bbox_utils import nonempty_bbox
  from .transformers import bbox_cxcywh_to_xyxy
label_desc: Use image node_id 4 for calling the BBoxPostProcess obj's underlying member method code with example usage: obj.get_origin_shape() and returns: self