index.js lines 70-73

firstInlineDecl.cloneBefore({
    prop,
    value: values.length <= 2 ? values.join(' ') : `logical ${values.join(' ')}`
});

This code takes in declarations like this:

top: 0;
left: 0;
right: auto;
bottom: auto;

and results in a declaration like this:

inset: logical 0 0 auto auto;

Such logical modifier does not exist.