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diff --git a/framework/main/interfaces/filesystem/binary/class_BinaryFile.php b/framework/main/interfaces/filesystem/binary/class_BinaryFile.php
index 5dcd2c4f..04bc7499 100644
--- a/framework/main/interfaces/filesystem/binary/class_BinaryFile.php
+++ b/framework/main/interfaces/filesystem/binary/class_BinaryFile.php
@@ -110,6 +110,14 @@ interface BinaryFile extends Filesystem {
 	 */
 	function getFileSize ();
 
+	/**
+	 * Checks whether the abstracted file only contains gaps by counting all
+	 * gaps' bytes together and compare it to total length.
+	 *
+	 * @return	$isGapsOnly		Whether the abstracted file only contains gaps
+	 */
+	function isFileGapsOnly();
+
 	/**
 	 * Searches for next suitable gap the given length of data can fit in
 	 * including padding bytes.