design

var FloatOperands = Type("FloatOperands", func() {
	Field(1, "a", Float64, "Left operand")
	Field(2, "b", Float64, "Right operand")
	Required("a", "b")
})

var IntOperands = Type("IntOperands", func() {
	Field(1, "a", Int, "Left operand")
	Field(2, "b", Int, "Right operand")
	Required("a", "b")
})