parseContentType function
Returns an instance of ContentType of the given mime type,
such as text/html; charset=utf-8
.
For example,
response.headers.contentType =
parseContentType('text/html; charset=utf-8');
It is the same as ContentType.parse, except it caches the result to speed up the parsing.
Implementation
ContentType parseContentType(String value)
=> _rawCtypes[value] ?? (_rawCtypes[value] = ContentType.parse(value));