src/main/java/js/container/ManagedClass.java
private String loadImplementationURL(Config descriptor) throws ConfigException {
		String implementationURL = descriptor.getAttribute("url");
		if (instanceType.equals(InstanceType.REMOTE) && implementationURL == null) {
			throw new ConfigException("Remote managed class requires <url> attribute. See class descriptor |%s|.", descriptor);
		}
		return implementationURL;
	}
private String loadImplementationURL(Config descriptor) throws ConfigException {
		String implementationURL = descriptor.getAttribute("url");
		if (instanceType.equals(InstanceType.REMOTE) && implementationURL == null) {
			throw new ConfigException("Remote managed class requires <url> attribute. See class descriptor |%s|.", descriptor);
		}
		return implementationURL;
	}
Load remote class URL from class descriptor, <code>url</code> attribute. This getter does not perform URL validation; it
returns URL value as declared by attribute.

@param descriptor class descriptor.
@return remote class URL value.
@throws ConfigException if instance type is {@link InstanceType#REMOTE} and <code>url</code> attribute is missing.