Work-with-entity_metadata_wrapper.php

<?php

function build_some_render_array($field) {
  
  $build = array(); // Drupal render array
  
  // more stuff happens here
  
  $entity = $field['entity'];
  $entity_wrapper = entity_metadata_wrapper('node', $entity);
  
  try {
    $value = $entity_wrapper->field_some_name->value();
  
    // more code
  
    return $result;
  }
  catch (Exception $e) {
    // do nothing
  }
  
  return drupal_render($build);
}