OptionalValidatedFloatProperty
open class OptionalValidatedFloatProperty(initialValue: Float?, bean: Any? = null, beanName: String? = null, validation: (ValidatedProperty<Float?>, Float?, Float?) -> Float?) : ValidatedProperty<Float?> , OptionalFloatProperty
Boilerplate which avoids having to use generics.
Similar to ValidatedFloatProperty, but the value can also be null.