namespace helpers
{
	
	/**
	 */
	export type storage<type_key, type_value> =
	{
		create : (value : type_value)=>Promise<type_key>;
		update : (key : type_key, value : type_value)=>Promise<void>;
		delete : (key : type_key)=>Promise<void>;
		read : (key : type_key)=>Promise<type_value>;
	};
	
	
	/**
	 */
	export type storage_sqltable = (
		storage<int, type_row>
		&
		{
			purge : (column : string, value : any)=>Promise<void>;
			take : (column : string, value : any)=>Promise<Array<type_row>>;
		}
	);
	
}