Feature request to check if a connection to a peer already exists

#### Version information:

All Versions
#### Type:

"feature": "ipfs swarm connect" with an option to check if a connection to a peer exists (but not open a new connection in case it does not exists) -> maybe a similar option exists already, but I was not able to find it)

#### Description:
Currently I use the function "ipfs swarm peers" to check if a connection to a peer exists.
But parsing all connected peers might be to not appropriate.