protected CookieAttributeHandler findAttribHandler(final String name) {
        return this.attribHandlerMap.get(name);
    }
Finds an attribute handler {@link CookieAttributeHandler} for the
given attribute. Returns {@code null} if no attribute handler is
found for the specified attribute.

@param name attribute name. e.g. Domain, Path, etc.
@return an attribute handler or {@code null}
httpclient5/src/main/java/org/apache/hc/client5/http/impl/cookie/AbstractCookieSpec.java