code: @Nonnull
    public static LoadedKey <KeyStore.SecretKeyEntry> loadSecretKey (@Nonnull final KeyStore aKeyStore,
                                                                     @Nonnull final String sKeyStorePath,
                                                                     @Nullable final String sKeyStoreKeyAlias,
                                                                     @Nullable final char [] aKeyStoreKeyPassword)
    {
      return _loadKey (aKeyStore, sKeyStorePath, sKeyStoreKeyAlias, aKeyStoreKeyPassword, KeyStore.SecretKeyEntry.class);
    }
docs: Load the specified secret key entry from the provided key store.
  
  @param aKeyStore
  The key store to load the key from. May not be <code>null</code>.
  @param sKeyStorePath
  Key store path. For nice error messages only. May be
  <code>null</code>.
  @param sKeyStoreKeyAlias
  The alias to be resolved in the key store. Must be non-
  <code>null</code> to succeed.
  @param aKeyStoreKeyPassword
  The key password for the key store. Must be non-<code>null</code> to
  succeed.
  @return The key loading result. Never <code>null</code>.