static verifyCodewordCount(codewords, numECCodewords) {
			if (codewords.length < 4) {
				// Codeword array size should be at least 4 allowing for
				// Count CW, At least one Data CW, Error Correction CW, Error Correction CW
				throw FormatException.getFormatInstance();
			}
			// The first codeword, the Symbol Length Descriptor, shall always encode the total number of data
			// codewords in the symbol, including the Symbol Length Descriptor itself, data codewords and pad
			// codewords, but excluding the number of error correction codewords.
			let numberOfCodewords = codewords[0];
			if (numberOfCodewords > codewords.length) {
				throw FormatException.getFormatInstance();
			}
			if (numberOfCodewords === 0) {
				// Reset to the length of the array - 8 (Allow for at least level 3 Error Correction (8 Error Codewords)
				if (numECCodewords < codewords.length) {
					codewords[0] = codewords.length - numECCodewords;
				}
				else {
					throw FormatException.getFormatInstance();
				}
			}
		}
Verify that all is OK with the codeword array.
@throws FormatException