Not clear about passing custom partials

[tonyouyang]

As mentioned in "Upgrading" section in readme, it seems possible to (dynamically) pass custom partials when rendering.

Here "dynamically" means that one can decide the partials conditionally instead of register them globally e.g. pass Handlebars.templates.foo as myPartial under one situation while Handlebars.templates.bar under others.

Am I correct? Note only the "Upgrading" section mentions the additional parameters for template API.