class_docstr: data is a list of lazy contexts.
code: def infer(self):
      return ContextSet.from_sets(l.infer() for l in self.data)
  
imports: from jedi.evaluate.base_context import ContextSet, NO_CONTEXTS
  from jedi.common.utils import monkeypatch
label_desc: Use image node_id 1 for calling the MergedLazyContexts obj's underlying member method code with example usage: obj.infer() and returns: ContextSet