function: name="local:test2"
.         par_1: 2
.         par_2: 3
.         par_3: 4
.         function: name="local:test1"
.         .         par_1: 3
.         .         par_2: 4
.         .         return  : name="local:test1"
.         .         .         $result: 12
.         return  : name="local:test2"
.         .         $result: 14
function: name="local:test2"
.         par_1: 1
.         par_2: 14
.         par_3: 5
.         function: name="local:test1"
.         .         par_1: 14
.         .         par_2: 5
.         .         return  : name="local:test1"
.         .         .         $result: 70
.         return  : name="local:test2"
.         .         $result: 71