This handler is responsible for replacing nodes in the source document
with the same nodes from the patch document. Note, additional nodes
from the patch document that are not present in the source document
are simply appended to the source document. This handler differs from its
parent in that it will not replace an existing node with a node from
the patch document if that patch node contains no child nodes.
Fields inherited from class org.broadleafcommerce.common.extensibility.context.merge.handlers.BaseHandler