This request will fail (HTTP 500) if at least one of the network collections doesn't have a network table with the specified column, even though other network collections do have that column in their network tables.
I therefore suggest that network collections which don't have the specified column are ignored for the search.
Used URL: http://example.com/v1/networks/ (docs: http://keiono.github.io/cy-rest/#-1099067042) with GET parameters "column" and "query".
This request will fail (HTTP 500) if at least one of the network collections doesn't have a network table with the specified column, even though other network collections do have that column in their network tables.
I therefore suggest that network collections which don't have the specified column are ignored for the search.