Options of Bot.triggerFlow (mapped onto Bot.trigger's data / body).
data
body
Optional
Shallow-merged into c.state before the first step runs (same as Bot.trigger's data).
c.state
Use data. Alias kept for the alpha; passing both throws a TypeError.
TypeError
ctx.body of the synthetic triggering message. Default ''.
ctx.body
''
Options of Bot.triggerFlow (mapped onto Bot.trigger's
data/body).