This actually executes the <Get> WSI node, specifying Orders as the table, with 'DumpOrder.xml.config' for the XmlPackage and an order number (if provided) as the DefaultWhereClause.
If GetAll is set to true, all data for all orders will be returned.
Warnings:
This can return a huge amount of data if GetAll is true.
Example(s):
Get all order data for order number 43254.
<GetOrder GetAll="false" OrderNumber="43254"/>