code: public PublicationsHandlerBuilder setPublicationsFilePkiTrustStore(File file, String password) throws KSIException {
          this.trustStore = Util.loadKeyStore(file, password);
          return this;
      }
docs: Loads the {@link KeyStore} from the file system and sets the {@link KeyStore} to be used as truststore to verify
  the certificate that was used to sign the publications file.
  
  @param file
  keystore file on disk, not null.
  @param password
  password of the keystore, null if keystore isn't protected by password.
  @return Instance of {@link PublicationsHandlerBuilder}.
  @throws KSIException
  when any error occurs.