js/libs/ember-1.5.1.js
function ArrayOperationMatch(operation, index, split, rangeStart) {
  this.operation = operation;
  this.index = index;
  this.split = split;
  this.rangeStart = rangeStart;
}
function ArrayOperationMatch(operation, index, split, rangeStart) {
  this.operation = operation;
  this.index = index;
  this.split = split;
  this.rangeStart = rangeStart;
}
Internal data structure used to include information when looking up operations
by item index.

@method ArrayOperationMatch
@private
@param {ArrayOperation} operation
@param {number} index The index of `operation` in the array of operations.
@param {boolean} split Whether or not the item index searched for would
require a split for a new operation type.
@param {number} rangeStart The index of the first item in the operation,
with respect to the tracked array.  The index of the last item can be computed
from `rangeStart` and `operation.count`.