This function gets the conflicting alt subsets from a configuration set. For each configuration {@code c} in {@code configs}:
<pre> mapc U= c.{@link ATNConfig#alt alt} # map hash/equals uses stack and context, not alt and not pred </pre>
See Implementation
This function gets the conflicting alt subsets from a configuration set. For each configuration {@code c} in {@code configs}:
<pre> mapc U= c.{@link ATNConfig#alt alt} # map hash/equals uses stack and context, not alt and not pred </pre>