Sets the regex to search for. Unsets the search regex when passed null.
Note that regex should have been created using the <literal>PCRE2_MULTILINE</literal> flag.
a #VteRegex, or null
PCRE2 match flags, or 0
Sets the regex to search for. Unsets the search regex when passed null.
Note that regex should have been created using the <literal>PCRE2_MULTILINE</literal> flag.