v::VegaVisualization
title::AbstractString = ""
grid::Bool = false
ticks::Number = 0
format::AbstractString = ""
layer::AbstractString = "front",
properties::Dict = Dict{Any, Any}
tickSize::Number = 0
tickSizeMajor::Number = 0
tickSizeMinor::Number = 0
tickSizeEnd::Number = 0

using Vega

x = [1:100; 1:100]
y = [[1:100] + randn(100); 3.0 + 1.5 * [1:100] + randn(100)]
group = [[1 for i in 1:100]; [2 for i in 1:100]]

v = lineplot(x = x, y = y, group = group)

xlab!(v, title = "Weight (kg)")
ylab!(v, title = "Height (cm)")