one key mapping to multiple values not implemented ??

[zmxdream]

`
/**

• \brief the structure for a list of key-value pairs
• The keys must be unique and sorted in an increasing order. The length of a
• value can be more than one. If \a lens is empty, then the length
• of a value is determined by k=vals.size()/keys.size(). The \a i-th KV pair
• is then
• \verbatim {keys[i], (vals[i*k], ..., vals[(i+1)*k-1])} \endverbatim
• If \a lens is given, then lens[i] is the length of the \a i-th
• value. Let
• \verbatim n = lens[0] + .. + lens[i-1] \endverbatim
• then the \a i-th KV pair is presented as
• \verbatim {keys[i], (vals[n], ..., vals[lens[i]+n-1])} \endverbatim
  */
  `
  hello , i read the source code and test the feature by specifying a key vector with size 1 and value vector with size 100 , and failed with check: key size not equal to value size , so this feature is not implemented??