code: @Pure
  	@Inline(value="$1.subtract($2)")
  	public static BigDecimal operator_minus(BigDecimal a, BigDecimal b) {
  		return a.subtract(b);
  	}
docs: The binary <code>minus</code> operator.
  
  @param a
  a BigDecimal. May not be <code>null</code>.
  @param b
  a BigDecimal. May not be <code>null</code>.
  @return <code>a.subtract(b)</code>
  @throws NullPointerException
  if {@code a} or {@code b} is <code>null</code>.