How to use the parchment.query function in parchment

Object.keys(formats).forEach((name) => {
          // Clean functionality in existing apps only clean inline formats
          if (Parchment.query(name, Parchment.Scope.INLINE) != null) {
            this.quill.format(name, false);
          }
        });
      } else {

Object.keys(formats).forEach(name => {
          // Clean functionality in existing apps only clean inline formats
          if (Parchment.query(name, Parchment.Scope.INLINE) != null) {
            this.quill.format(name, false, Quill.sources.USER);
          }
        });
      } else {

insertAt(index, value, def) {
    if (def != null && this.whitelist != null && !this.whitelist[value]) return;
    if (index >= this.length()) {
      if (def == null || Parchment.query(value, Parchment.Scope.BLOCK) == null) {
        let blot = Parchment.create(this.statics.defaultChild);
        this.appendChild(blot);
        if (def == null && value.endsWith('\n')) {
          value = value.slice(0, -1);
        }
        blot.insertAt(0, value, def);
      } else {
        let embed = Parchment.create(value, def);
        this.appendChild(embed);
      }
    } else {
      super.insertAt(index, value, def);
    }
    this.optimize();
  }

attach(input) {
    let format = [].find.call(input.classList, (className) => {
      return className.indexOf('ql-') === 0;
    });
    if (!format) return;
    format = format.slice('ql-'.length);
    if (input.tagName === 'BUTTON') {
      input.setAttribute('type', 'button');
    }
    if (this.handlers[format] == null) {
      if (this.quill.scroll.whitelist != null && this.quill.scroll.whitelist[format] == null) {
        debug.warn('ignoring attaching to disabled format', format, input);
        return;
      }
      if (Parchment.query(format) == null) {
        debug.warn('ignoring attaching to nonexistent format', format, input);
        return;
      }
    }
    let eventName = input.tagName === 'SELECT' ? 'change' : 'click';
    input.addEventListener(eventName, (e) => {
      let value;
      if (input.tagName === 'SELECT') {
        if (input.selectedIndex < 0) return;
        let selected = input.options[input.selectedIndex];
        if (selected.hasAttribute('selected')) {
          value = false;
        } else {
          value = selected.value || false;
        }
      } else {

return modify.call(this, () => {
      let range = this.getSelection(true);
      let change = new Delta();
      if (range == null) {
        return change;
      } else if (Parchment.query(name, Parchment.Scope.BLOCK)) {
        change = this.editor.formatLine(range.index, range.length, { [name]: value });
      } else if (range.length === 0) {
        this.selection.format(name, value);
        return change;
      } else {
        change = this.editor.formatText(range.index, range.length, { [name]: value });
      }
      this.setSelection(range, Emitter.sources.SILENT);
      return change;
    }, source);
  }

function matchBlot(node, delta) {
  let match = Parchment.query(node);
  if (match == null) return delta;
  if (match.prototype instanceof Parchment.Embed) {
    let embed = {};
    let value = match.value(node);
    if (value != null) {
      embed[match.blotName] = value;
      delta = new Delta().insert(embed, match.formats(node));
    }
  } else if (typeof match.formats === 'function') {
    let formats = { [match.blotName]: match.formats(node) };
    delta = delta.compose(new Delta().retain(delta.length(), formats));
  }
  return delta;
}

let lineFormats = Object.keys(context.format).reduce(function(lineFormats, format) {
    if (Parchment.query(format, Parchment.Scope.BLOCK) && !Array.isArray(context.format[format])) {
      lineFormats[format] = context.format[format];
    }
    return lineFormats;
  }, {});
  this.quill.insertText(range.index, '\n', lineFormats, Quill.sources.USER);

attach(input) {
    let format = [].find.call(input.classList, (className) => {
      return className.indexOf('ql-') === 0;
    });
    if (!format) return;
    format = format.slice('ql-'.length);
    if (input.tagName === 'BUTTON') {
      input.setAttribute('type', 'button');
    }
    if (this.handlers[format] == null) {
      if (this.quill.scroll.whitelist != null && this.quill.scroll.whitelist[format] == null) {
        debug.warn('ignoring attaching to disabled format', format, input);
        return;
      }
      if (Parchment.query(format) == null) {
        debug.warn('ignoring attaching to nonexistent format', format, input);
        return;
      }
    }
    let eventName = input.tagName === 'SELECT' ? 'change' : 'click';
    input.addEventListener(eventName, (e) => {
      let value;
      if (input.tagName === 'SELECT') {
        if (input.selectedIndex < 0) return;
        let selected = input.options[input.selectedIndex];
        if (selected.hasAttribute('selected')) {
          value = false;
        } else {
          value = selected.value || false;
        }
      } else {