Run 2 declarative pipelines in parallel

[Mahammad Azeem]

hi Jenkins team,

I would want to know is there any way to run 2 declarative pipelines using parallel construct ?

As per a cloud bees documentation:
https://www.cloudbees.com/blog/parallelism-and-distributed-builds-jenkins

parallel (
     "stream 1" : { ... things ...  },
     "stream 2" : { ... things in parallel ... }
   )
  

This syntax can only use "node"  but cannot use "pipeline". Like below

(1) parallel (

 "stream 1" : {

node .......

},

"stream 2" : {

node .......

}

)

(2) parallel (

 "stream 1" : {

pipeline.......

},

"stream 2" : {

pipeline.......

}

)

(1) is working fine (2) is not working. My requirement is to use (2). Because, post build actions(success/failure/abort etc) are supported in only (2) not (1) 

In (1) i don't want to include exception handling logic (try / catch) in (1).

Please assist.