public long getFileLength() {
		if (reader != null) {
			try {
				return reader.length();
			} catch (IOException e) {
				// IGNORE
				return  0;
			}
		}
		return  0;
	}
Returns the NT header from the PE image.
@return the NT header from the PE image
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/pe/PortableExecutable.java