private byte[] getBytesFromMemBuff(MemBuffer memBuffer, int copyLen) {
		// round copyLen down to multiple of paddedCharSize
		copyLen = (copyLen / paddedCharSize) * paddedCharSize;

		byte[] bytes = new byte[copyLen];
		if (memBuffer.getBytes(bytes, 0) != bytes.length) {
			return null;
		}
		return bytes;
	}
Returns the string contained in the specified {@link MemBuffer}, or null if all the bytes of
the string could not be read.
<p>
This method deals in characters of size {@link #charSize}, that might be
{@link #paddedCharSize padded} to a larger size. The raw n-byte characters are converted into
a Java String using a Java {@link Charset} or by using a custom Ghidra conversion. (see
convertBytesToStringCustomCharset)
<p>
The MemBuffer's endian'ness is used to determine which end of the {@link #paddedCharSize
padded } field contains our {@link #charSize} character bytes which will be used to create
the java String.

@return String containing the characters in buf or null if unable to read all {@code length}
        bytes from the membuffer.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/StringDataInstance.java