Defining rules can become quite verbose, and it can be tricky to prepare the proper list structure for the POST or PUT request. These functions simplify things a bit and provide a leaner, more semantic interface.
condition(address, operator, value)action(address, method, ...)
path to attribute or resource
one of: eq, gt, lt, dx, ddx, stable, not stable, in, not in
the value a condition will compare against
the HTTP method used to send the body to the given address
named parameters to include in action body
Returns a list-like structure suitable for create_rule()
or set_rule_attributes().