<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_Slice(self, node):
 """ Set slicing type using continuous information if provided. Also visit subnodes as they may contains relevant typing information. """

        self.generic_visit(node)
        if node.step is None or (isinstance(node.step, ast.Num) and
                                 node.step.n == 1):
            self.result[node] = self.builder.NamedType(
                'pythonic::types::contiguous_slice')
        else:
            self.result[node] = self.builder.NamedType(
                'pythonic::types::slice')