The message formatting syntax a string is written in.
MF1
@messageformat/icu-messageformat-1
MF2
NONE
The message formatting syntax a string is written in.
MF1— ICU MessageFormat 1 (formatted via@messageformat/icu-messageformat-1).MF2— Unicode MessageFormat 2 (the default, for backwards compatibility).NONE— not a formatted message; the raw string is returned as-is.