getUserData
fn
void * getUserData(cairo.context.Context cr, cairo.types.UserDataKey key)Return user data previously attached to cr using the specified key. If no user data has been attached with the given key this function returns null.
Parameters
cr | a #cairo_t |
key | the address of the #cairo_user_data_key_t the user data was attached to |
Returns
the user data previously attached or null.