[LayaAir 2.0]laya 预加载粒子文件时警告？请问是什么情况？

GradientDataNumber warning:the forth key is be force set to 1.
laya.d3.js:16710
GradientDataNumber warning:data count must lessEqual than 4
laya.d3.js:16716
GradientDataNumber warning:data count must lessEqual than 4
laya.d3.js:16716
GradientDataColor warning:the forth key is be force set to 1.
laya.d3.js:20355
Gradient:warning:data count must lessEqual than 4
laya.d3.js:15639
GradientDataNumber warning:the forth key is be force set to 1.
laya.d3.js:16710
GradientDataNumber warning:data count must lessEqual than 4
laya.d3.js:16716
GradientDataNumber warning:data count must lessEqual than 4
laya.d3.js:16716
GradientDataColor warning:the forth key is be force set to 1.
laya.d3.js:20355
Gradient:warning:data count must lessEqual than 4
laya.d3.js:15639
GradientDataNumber warning:the forth key is be force set to 1.
laya.d3.js:16710
GradientDataNumber warning:data count must lessEqual than 4
laya.d3.js:16716
GradientDataNumber warning:data count must lessEqual than 4
laya.d3.js:16716
GradientDataColor warning:the forth key is be force set to 1.
laya.d3.js:20355
Gradient:warning:data count must lessEqual than 4