Resolves a native method in an external library package and returns a Method object instance that can be used to call the external method. The descriptor is a string containing whitespace-delimited tokens that identify the location of the native method. The first token identifies the type of native function and must be LIBRARY. The second token must identify the name of the external library. The external library is located using platform-specific mechanisms for loading libraries. For Unix-based systems, the library name is case-sensitive. The third token is optional and specifies the name of the method within the library package. If not specified, name is used. The method name is not case sensitive. If the target method cannot be resolved, .nil is returned.

method = .Method~loadExternalMethod("homeAddress=", "LIBRARY mylib setHomeAddress")