checkIsHostForProgram function takes a new 'logic' argument. It determines which logic should be used to look up for program entity. If the argument is not given, the standard program_logic will be used.

/**
 * @param {Page[]} pages
 * @param {number} [id] Specifies the id, if applicable.
 * @param {String} [title = This is untitled.] Specifies the title.
 */
function Document(pages, id, title){
}