An object that represents the action of adding a header field to a response.
If the header with specified value already exists, nothing will be added.
If the header exists with different value, additional header name:value pair will be added.
Comma separated header values are not considered individually (instead as a single value) when adding a new header field.
An object that represents the action of adding a header field to a response. If the header with specified value already exists, nothing will be added. If the header exists with different value, additional header name:value pair will be added. Comma separated header values are not considered individually (instead as a single value) when adding a new header field.