read / write
The type of source reported. Possible string values are:
- "THREAT_SOURCE_TYPE_UNSPECIFIED" : Unknown.
- "MATCHING_URL" : The URL that matched the threat list (for which GetFullHash returned a valid hash).
- "TAB_URL" : The final top-level URL of the tab that the client was browsing when the match occurred.
- "TAB_REDIRECT" : A redirect URL that was fetched before hitting the final TAB_URL.
- "TAB_RESOURCE" : A resource loaded within the final TAB_URL.