[HISTORICAL] HOWTO easily "hack" the SysML-1.6 ~InterfaceBlock conjugation and «~interfaceBlock» keywords in MagicDraw/Cameo. [NOW SUPPORTED 2024x Golden]

Create (in your own Profile package) a "temporary" custom stereotype ~InterfaceBlock that extends (has a Generalization to) the stereotype InterfaceBlock
Give your ~InterfaceBlock stereotype a property original:InterfaceBlock
Create a Customization also called ~InterfaceBlock and set its customizationTarget to be your stereotype ~InterfaceBlock (easy using drag n' drop)
Set the 'keyword' of that Customization to be '~interfaceBlock' so when applied it will show as «~interfaceBlock»
Now make sure your Customization for ~InterfaceBlock for extends (has a Generalization to) the tool's existing Customization for InterfaceBlock (which you can do using search).
- Note how the existing one already has hideMetatype=true
!!!SAVE THEN CLOSE YOUR PROJECT then RE-OPEN YOUR PROJECT!!!

Did you CLOSE then RE-OPEN YOUR PROJECT? No? Then CLOSE then RE-OPEN YOUR PROJECT!

One easy way (until full tool support comes) to use your custom stereotype is to create a regular InterfaceBlock using the menus then use refactor to convert it to an ~InterfaceBlock. Then use the specification dialog to set the tagged value for the original.

Ensure that every provided/required Feature of each ~InterfaceBlock is the opposite of its original InterfaceBlock, and that if the name of the original is Name that its matching ~InterfaceBlock is ~Name

Beware that once tool support comes you will have to migrate all of your custom ~InterfaceBlock instances, but you can find them easily from the specification dialog for the custom stereotype.