docs: public VariableResolver<String> createVariableResolver(AbstractBuild<?,?> build) {
          VariableResolver[] resolvers = new VariableResolver[getParameters().size()+1];
          int i=0;
          for (ParameterValue p : getParameters()) {
              if (p == null) continue;
              resolvers[i++] = p.createVariableResolver(build);
          }
              
          resolvers[i] = build.getBuildVariableResolver();
  
          return new VariableResolver.Union<String>(resolvers);
      }