Indicates that when dragging an existing connection by its source endpoint, it can be relocated onto any other source element, by dropping it anywhere on a source element. But it cannot be dropped onto any target element. This flag is equivalent to
REDROP_POLICY_ANY but with the stipulation that the element on which the connections is being dropped must itself be configured with one or more source selectors.
REDROP_POLICY_ANY_SOURCE = "anySource"