Gao Hongtao 1473c04d3e Introduce label system to histogram (#5425)		2020-09-04 14:49:47 +08:00
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main	Introduce label system to histogram (#5425)	2020-09-04 14:49:47 +08:00
test	Introduce label system to histogram (#5425)	2020-09-04 14:49:47 +08:00