Search for gradient definition inside CSS value under cursor
@param {String} content
@param {Number} pos
@returns {Object}
function findGradientFromPosition(content, pos) {
		var cssProp = null;
		/** @type EditContainer */
		var cssRule = require('cssEditTree').parseFromPosition(content, pos, true);
		
		if (cssRule) {
			cssProp = cssRule.itemFromPosition(pos, true);
			if (!cssProp) {
				// in case user just started writing CSS property
				// and didn't include semicolon–try another approach
				cssProp = _.find(cssRule.list(), function(elem) {
					return elem.range(true).end == pos;
				});
			}
		}
		
		return {
			rule: cssRule,
			property: cssProp
		};
	}