Method to call the operation originally named list
Meta informations extracted from the WSDL
- SOAPHeaderNames : SessionHeader, ClusterHeader
- SOAPHeaderNamespaces : urn:api.actonsoftware.com, urn:api.actonsoftware.com
- SOAPHeaderTypes : \Api\StructType\ApiSessionHeader, \Api\StructType\ApiClusterHeader
- SOAPHeaders : optional, required
- documentation: Obtain a listing of different types of items in the system (e.g. CONTACT_LISTS)