regexMatch property
The value of the header must match the regular expression specified in regexMatch.
For more information about regular expression syntax, see Syntax. For matching against a port specified in the HTTP request, use a headerMatch with headerName set to PORT and a regular expression that satisfies the RFC2616 Host header's port specifier. Only one of exactMatch, prefixMatch, suffixMatch, regexMatch, presentMatch or rangeMatch must be set. Regular expressions can only be used when the loadBalancingScheme is set to INTERNAL_SELF_MANAGED.
Implementation
core.String? regexMatch;