message listLDAPContainersRequest
parts 
parameters
element container:listLDAPContainers
used by 
Operation listLDAPContainers in PortType ContainerService
source 
<wsdl:message name="listLDAPContainersRequest">
  <wsdl:part name="parameters" element="container:listLDAPContainers"/>
</wsdl:message>

WSDL documentation generated by XMLSpy WSDL Editor http://www.altova.com/xmlspy