Showing content from https://www.playframework.com/documentation/2.5.x/api/scala/play/api/data/OptionalMapping.html below:
OptionalMapping - play.api.data.OptionalMapping
final def !=(arg0: Any): Boolean
final def ##(): Int
final def ==(arg0: Any): Boolean
def addPrefix(prefix: String): Option[String]
def applyConstraints(t: Option[T]): Either[Seq[FormError], Option[T]]
final def asInstanceOf[T0]: T0
def bind(data: Map[String, String]): Either[Seq[FormError], Option[T]]
def clone(): AnyRef
def collectErrors(t: Option[T]): Seq[FormError]
val constraints: Seq[Constraint[Option[T]]]
final def eq(arg0: AnyRef): Boolean
def finalize(): Unit
val format: Option[(String, Seq[Any])]
final def getClass(): Class[_]
final def isInstanceOf[T0]: Boolean
val key: String
val mappings: Seq[Mapping[_]]
final def ne(arg0: AnyRef): Boolean
final def notify(): Unit
final def notifyAll(): Unit
final def synchronized[T0](arg0: â T0): T0
def transform[B](f1: (Option[T]) â B, f2: (B) â Option[T]): Mapping[B]
def unbind(value: Option[T]): Map[String, String]
def unbindAndValidate(value: Option[T]): (Map[String, String], Seq[FormError])
def verifying(addConstraints: Constraint[Option[T]]*): Mapping[Option[T]]
def verifying(error: â String, constraint: (Option[T]) â Boolean): Mapping[Option[T]]
def verifying(constraint: (Option[T]) â Boolean): Mapping[Option[T]]
final def wait(): Unit
final def wait(arg0: Long, arg1: Int): Unit
final def wait(arg0: Long): Unit
def withPrefix(prefix: String): Mapping[Option[T]]
val wrapped: Mapping[T]
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