No restraining order or temporary or permanent injunction shall be granted in any case involving or growing out of a labor dispute, except on the basis of findings of facts made and filed by the court in the record of the case prior to the issuance of such restraining order or writ of injunction; and every restraining order or writ of injunction granted in a case involving or growing out of a labor dispute shall include only a prohibition of such specific act or acts as may be expressly complained of in the bill of complainants or petition filed in such case and as shall be expressly included in said findings of fact made and filed by the court in the records of the case, as provided in this section.