# Vector length calculation service message
float64 x
float64 y
float64 z
---
float64 vec_len

## format  <type> <name> <optional_default_value>
##primitive message types
#    bool
#    byte
#    char
#    float32, float64
#    int8, uint8
#    int16, uint16
#    int32, uint32
#    int64, uint64
#    string
