code: def visit_simple_value_boolean_query(self, node):
          
          node.left, node.right = node.left.accept(self), node.right.accept(self)
          return node
docs: Visits only the children of :class:`SimpleValueBooleanQuery` without substituting the actual node type.
  
          Notes:
              Defer conversion from :class:`SimpleValueBooleanQuery` to AndOp or OrOp.
              This transformation needs to occur higher in the tree, so that we don't lose the information that this is a
              boolean query among terminals and thus the associative rule needs to be applied if we reached here from a
              keyword query, or a conversion from :class:`SimpleValueBooleanQuery` to :class:`AndOp` or :class:`OrOp`,
              otherwise.