How can I add more injection options in blockly?

Good Morning sir @ewpatton,

I want to add more injection options while injecting blockly in a div.

var workspace = Blockly.inject('blocklyDiv', {toolbox: toolbox});

But I didn't seen any similar code in appinventor's repo where I can add injection options ? Even there is no code which contains Blockly.inject
Do you know where it is written ? Actually, I want to add Grid options in blockly

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