+ /**
+ * Return the value in SI units from the default unit of this group.
+ * It is the same as calling <code>getDefaultUnit().fromUnit(value)</code>
+ *
+ * @param value the default unit value to convert
+ * @return the value in SI units.
+ * @see Unit#fromUnit(double)
+ */
+ public double fromUnit( double value ) {
+ return this.getDefaultUnit().fromUnit(value);
+ }