Newcomb v. Roarty, Fla. 1957, 93 So.2d 373. Incidental questions occurring throughout the litigation, the resolution of which might be helpful, if not dispositive of the entire case, are not properly the subject of a certified question. Newcomb v. Roarty, supra; Gordon v. Norris, Fla. 1956, 90 So.2d 914. In the latter case the Supreme Court pointed out that in order to avoid intruding on established areas of judicial procedure the exercise of jurisdiction under the certified question rule necessarily has its limitations, some of which are: