Function _findNextHorizontalSegment`Private`

_findNextHorizontalSegment(currentSegment, currentSegmentIndex, segments): {
    index: number;
    others: OrthogonalSegment[];
    segment: OrthogonalSegment;
}
Private
from some given vertical segment, find the next horizontal segment, gathering any other vertical segments found along the way. Searches as far as the end stub.
Parameters
- currentSegment: OrthogonalSegment
- currentSegmentIndex: number
- segments: OrthogonalSegment[]
Returns {
    index: number;
    others: OrthogonalSegment[];
    segment: OrthogonalSegment;
}
- index: number
- others: OrthogonalSegment[]
- segment: OrthogonalSegment

Function _findNextHorizontalSegmentPrivate