private static int getNumberBytesInCodedInt(byte firstByte) {
		if ((firstByte & 0x80) == 0)
			return 1;
		if ((firstByte & 0xc0) == 0x80)
			return 2;
		if ((firstByte & 0xe0) == 0xc0)
			return 4;
		return 0;
	}
Parses the coded blob size that the given reader is positioned at.

@param reader The reader to use to read the coded blob size.
@return The size of the blob contents in bytes.
@throws IOException if there is a problem reading the coded size field.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/pe/cli/blobs/CliBlob.java