Returns true if the passed in IDocumentFieldSource instance can be seen as a source originating from the same element. This means that even if the passed in element or this element has been changed, e.g. elementName has been changed, it will still return true if the original source is equal. This method is therefore different from 'Equals' which compares all elements.

bool IsSame(
	IDocumentFieldSource source
)

Function IsSame ( 
	source As IDocumentFieldSource
) As Boolean