@java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    hash = (37 * hash) + MIME_TYPE_FIELD_NUMBER;
    hash = (53 * hash) + getMimeType().hashCode();
    switch (sourceCase_) {
      case 1:
        hash = (37 * hash) + CONTENT_FIELD_NUMBER;
        hash = (53 * hash) + getContent().hashCode();
        break;
      case 2:
        hash = (37 * hash) + GCS_SOURCE_FIELD_NUMBER;
        hash = (53 * hash) + getGcsSource().hashCode();
        break;
      case 0:
      default:
    }
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }
<pre>
Specifies the input document's mime_type.

If not specified it will be determined using the file extension for
gcs_source provided files. For a file provided through bytes content the
mime_type must be provided.
Currently supported mime types are:
- application/pdf
- application/vnd.openxmlformats-officedocument.wordprocessingml.document
- application/vnd.openxmlformats-officedocument.presentationml.presentation
- application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
</pre>

<code>string mime_type = 4;</code>

@return The bytes for mimeType.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/DocumentInputConfig.java