1. override
Expression operator /(EquationMember m)

Creates a Expression by dividing this member by the argument. Both members may need to be hoisted to expressions themselves before this can occur.

Warning: This operation may throw a ParserException if the resulting expression is no longer linear. This is because a non-linear Expression may not be used to create a constraint. The divisor (i.e. the argument) must evaluate to a constant.

For example: ((left + right) / cm(2.0) >= mid declares a midpoint constraint. Notice that the divisor of the left hand Expression is a constant.

Source 

@override
Expression operator /(EquationMember m) {
  if (!m.isConstant) {
    throw new ParserException(
        'The divisor was not a constant expression', <EquationMember>[this, m]);
  }

  return this._applyMultiplicand(1.0 / m.value);
}