Function: Whether the current user has a specific capability.

Function: Whether the current user has a specific capability for a given site.

Function: Whether the author of the supplied post has a specific capability.

Function: Whether a particular user has a specific capability.

Function: Retrieves the global WP_Roles instance and instantiates it if necessary.

Function: Retrieve role object.

Function: Add role, if it does not exist.

Function: Remove role, if it exists.

Function: Retrieve a list of super admins.

Function: Map meta capabilities to primitive capabilities.