1. A method for use in management of network elements in a 3GPP wireless communications network operating as a Self Organizing Network (SON) performed by a network element of said network, the method comprising: receiving, via an interface, by an agent operating in said network element, said interface being a 3GPP Integration Reference Point implemented as an application programming interface (API) for invoking SON functions, a request, said request being from a predefined set of requests, to execute a first SON function, said first SON function being from a predefined set of SON functions, wherein said first SON function relates to management of at least one network element and said first SON function is implemented in a network element where it is to be executed; sending to said first SON function a message corresponding to said request; and executing said first SON function.