Collapsible Blocks Example

Collapsible block:

I'm a collapsible block

I'm the content in the collapsible block.

Defaults to open:

I'm a collapsible block

I'm the content in the collapsible block.

Nested Collapsible blocks:

I'm a collapsible block

I'm the content in the collapsible block.

I'm a nested collapsible block

I'm the content in the nested collapsible block.