index.js
function findDirectChildren( className ) {
	var children = [];
	for ( var longname in parents ) {
		if ( parents[ longname ] === className ) {
			children.push( longname );
		}
	}
	return children;
}
function findDirectChildren( className ) {
	var children = [];
	for ( var longname in parents ) {
		if ( parents[ longname ] === className ) {
			children.push( longname );
		}
	}
	return children;
}
Finds all the direct children of a given class name.

@param {string} className
@returns {string[]} Array of the child classes' names