Issue with generating request XML body using Operation's build method

[njng]

I have an issue creating the request XML in an Operation object

This is relevant part of the WSDL:

            <s:element name="ProcessVarRequest">
                <s:complexType>
                    <s:sequence>
                        <s:element minOccurs="0" maxOccurs="1" name="actiondoc">
                            <s:complexType mixed="true">
                                <s:sequence>
                                    <s:any />
                                </s:sequence>
                            </s:complexType>
                        </s:element>
                    </s:sequence>
                </s:complexType>
            </s:element>

This is the result of calling example_body from the Operation object:
{:ProcessVarRequest=>{:actiondoc=>{}}}

This is Hash that is passed in to the Operation's body:
{ ProcessVarRequest: { actiondoc: { nocsvc: { ... } } }

Sekken::XML::Element for "ProcessVarRequest":

#<Sekken::XML::Element:0x000000066a5da0
  @attributes=[],
  @children=[],
  @complex_type_id="http://www.levelplatforms.com/nocsupportservices/2.0/:",
  @form="qualified",
  @name="actiondoc",
  @namespace="http://www.levelplatforms.com/nocsupportservices/2.0/",
  @parent=
   #<Sekken::XML::Element:0x000000066ae428
    @attributes=[],
    @children=[...],
    @complex_type_id="http://www.levelplatforms.com/nocsupportservices/2.0/:",
    @form="qualified",
    @name="ProcessVarRequest",
    @namespace="http://www.levelplatforms.com/nocsupportservices/2.0/",
    @recursive=false,
    @singular=true>,
  @recursive=false,
  @singular=true>

When I call build on the Operation object, it just creates an empty "actiondoc" element.
"<env:Body>\n <lol0:ProcessVarRequest>\n <lol0:actiondoc/>\n </lol0:ProcessVarRequest>\n </env:Body>\n</env:Envelope>\n"

Expected:

	        <ProcessVarRequest xmlns="http://www.levelplatforms.com/nocsupportservices/2.0/">
	            <actiondoc>
	                <nocsvc xmlns="">
                            ...
	                </nocsvc>
	            </actiondoc>
	        </ProcessVarRequest>

How can I properly generate the XML request body to show the nested elements? Is this a problem of it being an "any" type?