Custom meta-wrappers

[t-silvers]

Is your feature request related to a problem? Please describe.
There is no documentation here or here on custom meta-wrappers. From source, it appears meta-wrappers cannot be sourced in the same manner as custom modules or custom wrappers.

Describe the solution you'd like

• Improved documentation on how the developers envision meta-wrappers to be used
• Improved documentation on valid arguments to meta_wrapper:

Describe alternatives you've considered
Defining external workflows, rather than meta-wrappers, as modules.