docs: public boolean init(Resource resource, Charset charset, boolean isUseVariable) {
  		if (resource == null) {
  			throw new NullPointerException("Null setting url define!");
  		}
  		this.settingUrl = resource.getUrl();
  		this.charset = charset;
  		this.isUseVariable = isUseVariable;
  
  		return load();
  	}