hideGridlines

hides or shows the gridlines of the sheet

void hideGridlines(boolean|string state, [string page] );

state	boolean\|string	true - to hide gridlines, false - show the gridlines, "toggle" - the opposite of the current state
page	string	optional, the name of the sheet. If not specified, the method is applied to the current sheet

$$("ssheet").hideGridlines(state, page);

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