<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def visit_BoolOp(self, node):
 """ Merge BoolOp operand type. BoolOp are "and" and "or" and may return any of these results so all operands should have the combinable type. """

        # Visit subnodes
        self.generic_visit(node)
        # Merge all operands types.
        [self.combine(node, value) for value in node.values]