_processFilesInput(srcEl, noSend = false) {
    const value2 = [];
    const files = srcEl.files;
    const seqCount = files.length;
    let seq = 0;
    for (const file of files) {
      const props = {};
      seq++;
      for (const prop in file) {
        props[prop] = file[prop];
      }
      props.tempUrl = window.URL.createObjectURL(file);
      value2.push(props);
      const meta = { seq, seqCount };
      meta.id = srcEl.id;
      if (srcEl.form) meta.formId = srcEl.form.id;
      meta.tempUrl = props.tempUrl;
      meta.data = srcEl.dataset;
      if (noSend !== true) this.uploadFile(file, meta);
    }
    return value2;
  }
Given a FileList array, send each file to Node-RED and return file metadata
@param {HTMLInputElement} srcEl Reference to the source input element
@param {boolean=} noSend If true, don't send the file to Node-RED. Default is to send.
@returns {Array<object>} Metadata values from all files
@private