wro4j-core/src/main/java/ro/isdc/wro/model/group/Group.java
public final boolean hasResourcesOfType(final ResourceType resourceType) {
    notNull(resourceType, "ResourceType cannot be null!");
    for (final Resource resource : resources) {
      if (resourceType.equals(resource.getType())) {
        return true;
      }
    }
    return false;
  }
public final boolean hasResourcesOfType(final ResourceType resourceType) {
    notNull(resourceType, "ResourceType cannot be null!");
    for (final Resource resource : resources) {
      if (resourceType.equals(resource.getType())) {
        return true;
      }
    }
    return false;
  }
Check if the group has at least one resource of some type.

@param resourceType
type of the searched resource.
@return true if at least one resource of some type exists.