Generate from commandbox multiple source

In the commandbox docbox example shows how to generate docs with multiple source:

docbox generate source="[{'dir':'../src/modules_app/v1/models', 'mapping':'v1.models'}, {'dir':'../src/modules_app/v2/models', 'mapping':'v2.models'}]" strategy-outputDir=docbox strategy-projectTitle="My API"

When I try to use it, the source params is interpreted as directory source and throws a error (just one in the example):

❯ docbox Generate source="[{'dir':'models/beans/workers/', 'mapping'='workers'}]"  strategy-outputDir=docs/docbox/ strategy-projectTitle="TC Models" mapping='Models'
Warning: '/home/david/src/todocoleccion/[{'dir':'models/beans/workers/', 'mapping'='workers'}]' does not exist.
Output: /home/david/src/todocoleccion/docs/docbox/
Starting Generation, please wait...

ERROR (6.0.0+00787)
Invalid configuration; source directory not found

Configured source /home/david/src/todocoleccion/[{'dir':'models/beans/workers/', 'mapping'='workers'}] does not exist.

How can I generate from multiple source?

It appears the text in the help for the command is out of date. The current method to supply more than one source Dir is like so:

docbox generate mappings:v1.models=/path/to/modules_app/v1/models mappings:v2.models=/path/to/modules_app/v2/models strategy-outputDir=/output/path strategy-projectTitle="My Docs"

So, instead of JSON, it’s as many mappings:xyz arguments as you like where xyz is the mapping and the value is the source path.