messageCommandCheck
Define a check which must pass for a message command to be executed. This check will be applied to all message commands in this extension.
A message command may have multiple checks - all checks must pass for the command to be executed. Checks will be run in the order that they're defined.
This function can be used DSL-style with a given body, or it can be passed one or more predefined functions. See the samples for more information.
Parameters
checks
Checks to apply to all slash commands.
Overloaded message command check function to allow for DSL syntax.
Parameters
check
Check to apply to all slash commands.