docs: protected void buildPropertyString(StringBuilder buffer) {
  		buffer.append("input = ").append(this.input).append("\n"); //$NON-NLS-1$//$NON-NLS-2$
  		buffer.append("output = ").append(this.output).append("\n"); //$NON-NLS-1$//$NON-NLS-2$
  		buffer.append("testInput = ").append(this.testInput).append("\n"); //$NON-NLS-1$//$NON-NLS-2$
  		buffer.append("testOutput = ").append(this.testOutput).append("\n"); //$NON-NLS-1$//$NON-NLS-2$
  	}