Checks if this year-month is equal to another year-month. !(p) The comparison is based on the time-line position of the year-months.
@param obj the object to check, null returns false @return true if this is equal to the other year-month
See Implementation
Checks if this year-month is equal to another year-month. !(p) The comparison is based on the time-line position of the year-months.
@param obj the object to check, null returns false @return true if this is equal to the other year-month