Position.lua
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			local util = include "util"

			local Position
			Position = util.merge(
			mixin "_has" ("X"),
			mixin "_has" ("Y"),
			mixin "_has" ("Z"),
			{
			setPosition = function(self, x, y, z)
			self:setX(x) self:setY(y) self:setZ(z)
			return self
			end,
			getPosition = function(self)
			return self:getX(), self:getY(), self:getZ()
			end
			}
			)

			return Position

cellulo-lovr/mixin/Position.lua7bc7bcd85032master