color migration misses nested function calls

[jsangmeister]

In the following example the color migrator reports Nothing to migrate! even though the deprecated color methods are used:

@use 'sass:color';

$color: red;

div {
    background-color: rgba(color.red($color), color.green($color), color.blue($color), 0.5);
}

Removing the rgba(...) function solves the issue and the migration is correctly applied, therefore I am assuming that nested function calls are not checked by the migrator.