Does Section 654, subdivision (a) of the California Criminal Code prohibit multiple punishment for a single crime?

Section 654, subdivision (a), provides in pertinent part: "[a]n act or omission that is punishable in different ways by different provisions of law shall be punished under the provision that provides for the longest potential term of imprisonment, but in no case shall the act or omission be punished under more than one provision." "Section 654 precludes multiple punishments for a single act or indivisible course of conduct." (People v. Hester (2000) 22 Cal.4th 290, 294.) "The purpose of this statute is to prevent multiple punishment for a single act or omission, even though that act or omission violates more than one statute and thus constitutes more than one crime." (People v. Hutchins (2001) 90 Cal.App.4th 1308, 1312.)