code: public static TypeDef typeExtends(TypeDef base, ClassRef superClass) {
          return new TypeDefBuilder(base)
                  .withExtendsList(superClass)
                  .build();
      }
docs: Sets one {@link io.sundr.codegen.model.TypeDef} as a super class of an other.
  
  @param base       The base type.
  @param superClass The super type.
  @return           The updated type definition.