Called when an 'insert new block' action is triggered: given a dict of data from the insertion control.
For a StreamBlock, the dict of data consists of 'type' (the chosen block type name, as a string).
Parameters
__namedParameters: {type:any}
Returns any[]
The block definition, initial state, and id for the new block
Called when an 'insert new block' action is triggered: given a dict of data from the insertion control. For a StreamBlock, the dict of data consists of 'type' (the chosen block type name, as a string).