code: def preds(self, Gx, core_x, v, Gx_node=None):
      pred = [n for n in Gx.predecessors(v) if n in core_x]
      if Gx_node:
          pred.append(Gx_node)
      return pred
  
imports: import networkx
  from .isomorphvf2 import DiGraphMatcher, GraphMatcher
label_desc: Use image node_id 7 for calling the TimeRespectingDiGraphMatcher obj's underlying member method code with example usage: obj.preds(Gx, core_x, v, Gx_node) and returns: pred