A specialized implementation of the IndexerModule interface for Tectonic
Provides a higher and more specific level of support for tectonic summary
products, including checking for "Reviewed" status on the tectonic summary.
These "Reviewed tectonic summmaries will always be preferred.
Calculate the preferred weight for a product summary.
This method is called after creating a product summary, but before
returning the created summary. It's return value is used to assign the
product summary preferred weight.
Within each type of product, the summary with the largest preferred
weight is considered preferred.