robolectric/src/main/java/org/robolectric/ConfigMerger.java
protected Properties getConfigProperties(String packageName) {
    List<String> packageParts = new ArrayList<>(Arrays.asList(packageName.split("\\.")));
    packageParts.add(RobolectricTestRunner.CONFIG_PROPERTIES);
    final String resourceName = Join.join("/", packageParts);
    try (InputStream resourceAsStream = getResourceAsStream(resourceName)) {
      if (resourceAsStream == null) return null;
      Properties properties = new Properties();
      properties.load(resourceAsStream);
      return properties;
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }
protected Properties getConfigProperties(String packageName) {
    List<String> packageParts = new ArrayList<>(Arrays.asList(packageName.split("\\.")));
    packageParts.add(RobolectricTestRunner.CONFIG_PROPERTIES);
    final String resourceName = Join.join("/", packageParts);
    try (InputStream resourceAsStream = getResourceAsStream(resourceName)) {
      if (resourceAsStream == null) return null;
      Properties properties = new Properties();
      properties.load(resourceAsStream);
      return properties;
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }
protected Properties getConfigProperties ( String packageName ) { List < String > packageParts = new ArrayList <> ( Arrays . asList ( packageName . split ( "\\." ) ) ) ; packageParts . add ( RobolectricTestRunner . CONFIG_PROPERTIES ) ; final String resourceName = Join . join ( "/" , packageParts ) ; try ( InputStream resourceAsStream = getResourceAsStream ( resourceName ) ) { if ( resourceAsStream == null ) return null ; Properties properties = new Properties ( ) ; properties . load ( resourceAsStream ) ; return properties ; } catch ( IOException e ) { throw new RuntimeException ( e ) ; } }
Return a {@link Properties} file for the given package name, or {@code null} if none is available.

@since 3.2
Return a { @link Properties } file for the given package name or { @code null } if none is available .