XYChart API attributes related to horizontal & vertical grid lines & row fill colors are not working.
This is reproducible with soma b17.

import javafx.scene.chart.part.*;
import javafx.scene.chart.*;
import javafx.scene.*;
import javafx.scene.paint.*;
import javafx.scene.shape.*;
import javafx.scene.text.*;
import javafx.stage.*;

var xAxis = NumberAxis {
        lowerBound: 0
        upperBound: 120
        tickUnit: 30
};
var yAxis = NumberAxis {
    lowerBound: 0
    upperBound: 30
    tickUnit: 10
};
var testData = LineChart.Series {
    name: "line"
    data: [
        LineChart.Data { xValue: 0.5, yValue: 0 }
        LineChart.Data { xValue: 5, yValue: 1 }
        LineChart.Data { xValue: 10, yValue: 2 }
        LineChart.Data { xValue: 15, yValue: 3 }
        LineChart.Data { xValue: 20, yValue: 4 }
        LineChart.Data { xValue: 25, yValue: 5 }
        LineChart.Data { xValue: 39, yValue: 6 }
    ]
};
var lineChart:LineChart = LineChart {
    horizontalGridLineVisible: true
    verticalGridLineVisible: true

    horizontalAlternateRowFill: Color.LIGHTGREY
    verticalAlternateRowFill: Color.BLUE

    horizontalGridLineStroke: Color.BROWN
    verticalGridLineStroke: Color.BLACK

    horizontalGridLineStrokeWidth:4
    verticalGridLineStrokeWidth: 4

    horizontalZeroLineVisible: true
    verticalZeroLineVisible: true

    showSymbols: false
    dataEffect: null
    xAxis: xAxis
    yAxis: yAxis
    data: testData
};
Stage {
    scene: Scene { content: [ lineChart ] }
    title: "Chart Test"
    width: 400
    height: 400
}