'emit' commands must specify a group

[shadetree01010100]

If group by has not been configured, so that its value is None (null in json), sending a command to emit with no group specified will not work. I found that I needed to set a group as a static string, and send emit commands with the group parameter.

[shadetree01010100]

Looks like when sending a request without group param, it is passed to the blocks emit method as a string "None", rather than the NoneType that matches the actual group. Because it's a string, the evaluation to emit all groups when no group is specified is failing, and it is instead trying to emit signals from a nonexistent group "None"

[shadetree01010100]

looks like the command parameter in the nio framework is stringifying NoneTypes niolabs/nio#138