performs basic validation on the directory parameter making sure it fits within the supported functionality of this class . concode_field_sep Path filePattern concode_elem_sep PathMatcher pathMatcher concode_elem_sep Path directory concode_elem_sep FileFlow<?> flow concode_field_sep String toString concode_elem_sep TrackedFileList listFiles concode_elem_sep int countFiles
void function ( Path arg0 ) { Preconditions . checkArgument ( arg0 != null , "srini_string" ) ; }