Check if current caret position is inside &lt;style&gt; tag
@param {IEmmetEditor} editor
@returns
function(editor) {
			var content = String(editor.getContent());
			var caretPos = editor.getCaretPos();
			var tag = require('htmlMatcher').tag(content, caretPos);
			return tag && tag.open.name.toLowerCase() == 'style' 
				&& tag.innerRange.cmp(caretPos, 'lte', 'gte');
		}