/**
  * Sets the value of the volume enter field.
  *
  * @param amount The value to set.
  */
 public void setVolume(double amount) {
   volume.setAmount(amount);
 }
 /**
  * Sets the value of the molarity enter field.
  *
  * @param amount The value to set.
  */
 public void setMolarity(double amount) {
   molarity.setAmount(amount);
 }