_getAllNodesOverlappingWith(object) {
    const overlappingNodes = [];
    const nodes = this.body.nodes;
    for (let i = 0; i < this.body.nodeIndices.length; i++) {
      const nodeId = this.body.nodeIndices[i];
      if (nodes[nodeId].isOverlappingWith(object)) {
        overlappingNodes.push(nodeId);
      }
    }
    return overlappingNodes;
  }
retrieve all nodes overlapping with given object
@param {object} object  An object with parameters left, top, right, bottom
@returns {number[]}   An array with id's of the overlapping nodes
@private