how to set the row color of CellTable based on values in a column

as shown in the attached diagram, there is a column with value 10, 20, 30, 40. I want to  set the row color based on this column value, for example, 10 is white, 20 is  yellow...., any method to do it?

I see there is

public void setRowStyles(RowStyles<T> rowStyles)
and 
java.lang.String getStyleNames(T row,                                 int rowIndex)

but I do not know how to use it? and the result of the getStyleNames is the css class name? but with this hide the origin style like row
in highlighted?

thanks

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