public FormatCompliance getFormatCompliance(final ByteSource byteSource) throws ImagingException, IOException {
        return null;
    }
Determines the format compliance of the content of the supplied byte source based on rules provided by a specific implementation.

@param byteSource A valid instance of ByteSource
@return true if the content is format-compliant; otherwise, false
@throws ImagingException may be thrown by sub-classes
@throws IOException      may be thrown by sub-classes
src/main/java/org/apache/commons/imaging/AbstractImageParser.java