<types>
    <type name="int3" primitiveType="int32" semanticType="FooType" length="3"/>
  </types>

    <field name="array" id="2" type="int3"/>

    std::uint64_t getArray(char *dst, const std::uint64_t length) const
    {
        if (length > 3)
        {
             throw std::runtime_error("length too large for getArray [E106]");
        }
        std::memcpy(dst, m_buffer + m_offset + 0, length);
        return length;
    }
    Simple3 &putArray(const char *src)
    {
        std::memcpy(m_buffer + m_offset + 0, src, 3);
        return *this;
    }