public static PropertiesEndpointGroup of(Path path, String endpointKeyPrefix) {
        return builder(path, endpointKeyPrefix).build();
    }
Returns a new {@link PropertiesEndpointGroup} created from the file at the specified {@link Path}.
Any updates in the file will trigger a dynamic reload. The value of each property whose name starts
with {@code endpointKeyPrefix} will be parsed with {@link Endpoint#parse(String)}, and then loaded
into the {@link PropertiesEndpointGroup}, e.g.

<pre>{@code
# endpointKeyPrefix = 'example.hosts.'
example.hosts.0=example1.com:36462
example.hosts.1=example2.com:36462
example.hosts.2=example3.com:36462
}</pre>

@param path the path of the file where list of {@link Endpoint}s is loaded from
@param endpointKeyPrefix the property name prefix
core/src/main/java/com/linecorp/armeria/client/endpoint/PropertiesEndpointGroup.java