How to multiple attacheShema?

I try to create soft remove library
Collection

import {Mongo} from 'meteor/mongo';
import SimpleSchema from 'simpl-schema';

const AccountTypes = new Mongo.Collection('acc_accountTypes');

AccountTypes.schema = new SimpleSchema({
    code: {
        type: String,
        unique: true
    },
    name: {
        type: String,
        unique: true
    },
    nature: {
        type: String,
        allowedValues: ['Asset', 'Liability', 'Equity', 'Revenue', 'Expense']
    },
    status: {
        type: String,
    },
    memo: {
        type: String,
        optional: true
    }
});

AccountTypes.attachSchema(AccountTypes.schema);
export default AccountTypes;

Library

// Soft Remove
CollectionExtensions.addPrototype('softRemove', function (selector = {}) {
    let self = this;
    const schema = new SimpleSchema({
        removed: Boolean,
        removedAt: Date,
        removedBy: String
    });
    self.attachSchema(schema, {selector: {type: 'softRemove'}});

    return self.direct.update(
        selector,
        {
            $set: {
                // selector: {type: 'softRemove'}, // where to put this
                removed: true,
                removedAt: new Date(),
                removedBy: Meteor.userId()
            }
        },
        {multi: true},
        (error, num) => {
            if (num) {
                console.log('soft remove');
            }
        }
    );
});

Please help me