code: public static PolicyCollection policiesFromSource(
              final YamlSource source,
              final Set<Attribute> forcedContext,
              final ValidationSet validation
      )
              throws IOException
      {
  
          return factory.policiesFromSource(source, forcedContext, validation);
      }
docs: Load policies from a source
  
  @param source        source
  @param forcedContext Context to require for all policies parsed
  
  @return policies
  
  @throws IOException