_insert_callbacks(callbacks, block = nil)
Instance Public methods
Take callback names and an optional callback proc, normalize them, then
call the block with each callback. This allows us to abstract the
normalization across several methods that use it.
Parameters
callbacks - An array of callbacks, with an optional options
hash as the last parameter.
block - A proc that should be
added to the callbacks.
Block Parameters
name - The callback to be added
options - A h