function getAlias( node ) {
		var props;
		var alias;
		var i;

		props = node.properties;
		for ( i = 0; i < props.length; i++ ) {
			if ( props[ i ].key.value === 'alias' ) {
				alias = props[ i ].value.value;
				if ( alias ) {
					return alias;
				}
			}
		}
	}
Extracts the alias value from a given node.

@private
@param {ASTNode} node - node containing properties to search
@returns {string} alias value