Define column but don't display on UI

Some columns have special characters which throws off the formula attribute

Children_out_of_primary_school: {name: Perc Children out of primary school, formula: "Children out of school (% of primary school age)" / 100}

In which case, we need to define a custom column before this line and use that key and use in the formula.

new_col_key: {name: Custom title, value: "Children out of school (% of primary school age)"}

Children_out_of_primary_school: {name: Perc Children out of primary school, formula: new_col_key / 100}