src/Ajaxer.php
protected function extract_action_slug( $action ) {
		$action = str_replace( $this->action_prefix, '', $action );
		$action = str_replace( $this->action_surfix, '', $action );
		$action = ltrim( $action, ' ' );
		$action = ltrim( $action, '_' );
		$action = rtrim( $action, ' ' );
		$action = rtrim( $action, '_' );
		return $action;
	}
protected function extract_action_slug( $action ) {
		$action = str_replace( $this->action_prefix, '', $action );
		$action = str_replace( $this->action_surfix, '', $action );
		$action = ltrim( $action, ' ' );
		$action = ltrim( $action, '_' );
		$action = rtrim( $action, ' ' );
		$action = rtrim( $action, '_' );
		return $action;
	}
Extracts Action Without Prefix / Surfix ($this->action_prefix | $this->action_surfix)

@param $action

@return string