Given a parameter name and a possibly-null default value, attempts to extract
the first parameter values and return a Some instance, returning the default
value if no parameter exists. If defaultValue is null and no parameter
exists, returns None.
Linear Supertypes
MultivaluedParameterExtractor[Option[String]], AnyRef, Any
Given a parameter name and a possibly-null default value, attempts to extract the first parameter values and return a Some instance, returning the default value if no parameter exists. If defaultValue is null and no parameter exists, returns None.