final String getAttributeName(final Attribute attribute) {
    Validate.notNull(attribute);
    return WroServletContextListener.class.getName() + "-" + attribute.name() + "-" + this.name;
  }
final String getAttributeName ( final Attribute attribute ) { Validate . notNull ( attribute ) ; return WroServletContextListener . class . getName ( ) + "-" + attribute . name ( ) + "-" + this . name ; }
Creates a unique name used as a key to store the attribute in {@link ServletContext}.

@param attribute
type of attribute.
@return the name of the attribute used to store in servlet context.
@VisibleForTesting