Revert "removed get_fields from ModelInterface"
Revert "removed get_fields from ModelInterface"

This reverts commit 1f446e4b8acf497514f33fedf3c3e80260b42f84.

PomeloProductions/word-wrap,axolotlinteractive/word-wrap,PomeloProductions/word-wrap,bryce13950/word-wrap,axolotlinteractive/word-wrap,bryce13950/word-wrap