question: gets an external uri that messenger can use to download the content on facebook 's servers instead of requiring the messenger application to upload the content . the content returned by the this uri must be exactly the same as the content specified by #geturi . if the content is different , messenger may fail to send the content . see developer docs for more info . concode_field_sep String mMetaData concode_elem_sep Uri mExternalUri concode_elem_sep String mMimeType concode_elem_sep Uri mUri concode_field_sep ShareToMessengerParamsBuilder setMetaData concode_elem_sep String getMimeType concode_elem_sep ShareToMessengerParams build concode_elem_sep String getMetaData concode_elem_sep Uri getUri concode_elem_sep ShareToMessengerParamsBuilder setExternalUri
target: Uri function ( ) { return mExternalUri ; }