The CollapsibleAccordion. I have two canvas inside the CollapsibleAccordion, and everything works fine, but the only problem is that i am unable to see the labels when I migrated my code to Flex4 from Flex3.The CollapsibleAccordion. I have two canvas ins
阅读背景：
从Flex3迁移到Flex4时，CollapsibleAccordion标签不可见问题
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