How to use

isIdDefined

method

in

jscl.math.function.IConstant

public void copy(@Nonnull MathEntity o) {
  if (o instanceof IConstant) {
    final IConstant that = ((IConstant) o);
    this.name = that.getName();
    this.value = that.getValue();
    this.description = that.getDescription();
    this.system = that.isSystem();
    if (that.isIdDefined()) {
      this.id = that.getId();
    }
  } else {
    throw new IllegalArgumentException("Trying to make a copy of unsupported type: " + o.getClass());
  }
}

public Builder(@Nonnull IConstant iConstant) {
  this.name = iConstant.getName();
  this.value = iConstant.getValue();
  this.system = iConstant.isSystem();
  this.description = iConstant.getDescription();
  if (iConstant.isIdDefined()) {
    this.id = iConstant.getId();
  }
}