[PD] coloring arrays

[João Pais]

> Pd's data-structures don't have to be allocated as separate items. They
> can be allocated in array-fashion, as one big block.
>
> What I say about Pd's data-structures doesn't apply to array-like types
> defined in other plugins, such as GridFlow, iemmatrix, iem16, Gem, PDP.  
> In
> theory, plugins can use data-structures and define new stuff about
> data-structures, but in practice, no-one ever did.

can you explain clearly what you meant in these 2 paragraphs?