function roundedEquals(a, b) {
    return a - 1 === b || a === b || a + 1 === b;
  }
roundedEquals takes two integers and checks if the first is within 1 of the second

@access private
@function roundedEquals
@param {number} a - first integer
@param {number} b - second integer
@returns {boolean} true if the first integer is within 1 of the second, false otherwise