Font family of grid text (should be supported by the browser)
Font size of grid text (in pixels, no unit)
Formatter used to format values before rendering them as text
Returns count of lines, that should be rendered for grid
Height of grid lines (in pixels, no unit)
Function that determines whether line label should be drawn or not
Vertical distance between text and lines (in pixels, no unit)
Color of grid text and lines. Can be any CSS valid color string