@Override
	public String toString() {
		String ratioStr = "1:1";
		if (!isOneToOneMapping()) {
			ratioStr = mappedByteCount + ":" + mappedSourceByteCount;
		}
		return ratioStr + " mapping";
	}
Construct byte mapping scheme specified as a ratio of mapped bytes to source bytes.
The two integer values in the range 1..127 are seperated by a ':' character.  The number of
mapped bytes must be less-than or equal to the number of source bytes.
@param mappingScheme mapping scheme in string form (e.g., "2:4").
@throws IllegalArgumentException if invalid mapping scheme specified
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/mem/ByteMappingScheme.java