@JvmStatic fun supertypeOf(lowerBound: TypeName): WildcardTypeName
Returns a type that represents an unknown supertype of bound. For example, if bound is
String.class, this returns ? super String.
@JvmStatic fun supertypeOf(lowerBound: Type): WildcardTypeName@JvmStatic fun supertypeOf(lowerBound: KClass<*>): WildcardTypeName