Webel ‘$opt$grp$’ with grouping qualifier (where ‘grp$’ could be a package nickname)

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Tutorial
[TECHNICAL SLIDE TRAIL] The Webel libraries for Wolfram Mathematica: With SysMLv1 models.
Section
SECTION: The Webel '$opt$' and '$arg$' help holder conventions for options and arguments in the Wolfram Language
Topic level
ESSENTIAL
Mathematica keywords
Options
Webel Mathematica keywords
'$opt$'
'$opt$pac$'
'$opt$grp$'
Keywords
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Webel '$opt$' options help by function: Example: tableFunctionOptions[f]
Notes
[NAMING, OPTION, PATTERN, TIP]{OPTION} Mathematica: Webel: You CAN/MAY use $ in variable names and function names - just not as the first character before a Capital - and it's extremely useful. You won't get sent to Azkaban prison if do you use a $ character!
[NAMING, PATTERN, POLICY]{STRICT} Webel: Mathematica: CONVENTION: Option help holders use a String variable with the prefix '$opt$', a related '$info$opt$' String, a 'def$opt$' default value expression, and optional '$warn$opt$', '$tip$opt$', '$lab$opt$', and 'type$opt$' indicator ...
[POLICY]{STRONG} About the Single Source of Truth (SSOT) and Don't Repeat Yourself (DRY) principles
Snippets (quotes/extracts)
Visit also
The Webel SysML4Mathematica recipe for modelling Wolfram Language code in Systems Modeling Language (SysML) for Model-Based Systems Engineering
Visit also (backlinks)
Related slides (includes other tutorials)
The Webel '$opt$', 'rule$opt$', '$arg$', 'rule$arg$' and supporting '$k$' conventions for "help holders"
The Webel '$opt$' option "help holder" convention
Related slides (backlinks, includes other tutorials)