This member is added by an implicit conversion from ContentTypeResolver to
any2stringadd[ContentTypeResolver] performed by method any2stringadd in scala.Predef.
This member is added by an implicit conversion from ContentTypeResolver to
ArrowAssoc[ContentTypeResolver] performed by method ArrowAssoc in scala.Predef.
This member is added by an implicit conversion from ContentTypeResolver to
StringFormat[ContentTypeResolver] performed by method StringFormat in scala.Predef.
This member is added by an implicit conversion from ContentTypeResolver to
ArrowAssoc[ContentTypeResolver] performed by method ArrowAssoc in scala.Predef.
Implement this interface to provide a custom mapping from a file name to a akka.http.javadsl.model.ContentType.