How do I generate a structure from a schematic? I tried to see how vanilla does it but I can't seem to figure it out.

I have figured it out.

 

WorldServer worldServer = (WorldServer)world;
MinecraftServer minecraftServer = world.getMinecraftServer();
TemplateManager templateManager = worldServer.getStructureTemplateManager();
Template template = templateManager.get(minecraftServer, new ResourceLocation("domain", "path"));

if(template == null)
{
    return false;
}
else if
{
    template.addBlocksToWorld(world, pos, new PlacementSettings());
}