MessageFormat constructor Null safety
Create a MessageFormat for the ICU message string pattern
.
It does parameter substitutions in a locale-aware way.
The syntax is similar to the one used by ICU and is described in the
grammar above.
Implementation
MessageFormat(String pattern, {String locale = 'en'})
: _locale = locale,
_pattern = pattern,
_numberFormat = NumberFormat.decimalPattern(locale);