jooby/src/main/java/org/jooby/Result.java
@Nonnull
  public Result header(final String name, final Object... values) {
    requireNonNull(name, "Header's name is required.");
    requireNonNull(values, "Header's values are required.");

    return header(name, ImmutableList.copyOf(values));
  }
@Nonnull
  public Result header(final String name, final Object... values) {
    requireNonNull(name, "Header's name is required.");
    requireNonNull(values, "Header's values are required.");

    return header(name, ImmutableList.copyOf(values));
  }
Sets a response header with the given name and value. If the header had already been set,
the new value overwrites the previous one.

@param name Header's name.
@param values Header's values.
@return This content.