The IMobilityFlag Interface allows you to get an IBlockState's possible mobilityFlags.

Importing the package

Link to importing-the-package

It might be required for you to import the package if you encounter any issues, so better be safe than sorry and add the import.
import crafttweaker.block.IMobilityFlag;

You can check if two IMobilityFlag objects are equal:
Returns a bool.

ZenScript
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flagOne.matches(other);

The MobilityFlag Interface has 5 static Methods, each returning the given IMobilityFlag object.

ZenScript
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crafttweaker.block.MobilityFlag.normal()
crafttweaker.block.MobilityFlag.destroy()
crafttweaker.block.MobilityFlag.block()
crafttweaker.block.MobilityFlag.ignore()
crafttweaker.block.MobilityFlag.pushOnly()