greaterThanOrEqual
fun ObservableDouble.greaterThanOrEqual(value: Double): BooleanUnaryFunction<Double, ObservableDouble>
fun ObservableDouble.greaterThanOrEqual(other: ObservableDouble): BooleanBinaryFunction<Double, ObservableDouble, Double, ObservableDouble>
fun ObservableFloat.greaterThanOrEqual(other: ObservableFloat): BooleanBinaryFunction<Float, ObservableFloat, Float, ObservableFloat>