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set line color from data

As mentioned in line section, there are two types of lines: in line and out line. The colors associated with these two types of lines are called inColor and outColor. Each line can have a unique color specified through the input data as follows:

[
        {
                "e": "CN",
                "i": "US",
                "v": 100000,
                "inColor": "#0000FF",
                "outColor": "#00FF00"
        },
        {
                "e": "CN",
                "i": "RU",
                "v": 3000000,
                "inColor": "#EE0E00",
                "outColor": "#FFFF00"
        }
]

Note: e, i, and v have the same definition as in addData.