There are a few issues with the current template.
 1. {{isArray}} is not taken into account. It results into a mismatch between
    the signatures of some clusters methods
 2. Instead of using raw types, such as 'uint8_t', 'uint16_t', the current template
    uses 'enum'. It creates 2 types of issues:
     * The current template generates code that rely on sizeof(type) to move the
       pointer for the payload buffer. It does not work well with 'enum'.
     * The signatures of methods are using raw types. So it ask for a change
       in all the cluster signatures.
  3. The buffer start pointer is mispositioned: It uses 0 instead of cmd->payloadStartIndex
  4. String are using 'uint8_t *', which is OK but the pointer to the payload buffer is not
     moved to take into account the additional bytes with the size of the string