_validateStep(step) {
      if (step === 0) {
        console.warn("The 'step' property must be a positive float number"); // eslint-disable-line
      }

      if (step < 0) {
        console.warn("The 'step' property must be a positive float number. The provided negative number has been converted to its positve equivalent"); // eslint-disable-line
      }

      if (Number.isNaN(step)) {
        console.warn("The 'step' property must be a positive float number. It has been set to its default value of 1"); // eslint-disable-line
      }
    }
Notify in case of a invalid step value type

@private