1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
'use strict';
const isDefiningProjection = require('./isDefiningProjection');
/*! * ignore */
module.exports = function isInclusive(projection) {  if (projection == null) {    return false;  }
  const props = Object.keys(projection);  const numProps = props.length;  if (numProps === 0) {    return false;  }
  for (let i = 0; i < numProps; ++i) {    const prop = props[i];    // Plus paths can't define the projection (see gh-7050)    if (prop.startsWith('+')) {      continue;    }    // If field is truthy (1, true, etc.) and not an object, then this    // projection must be inclusive. If object, assume its $meta, $slice, etc.    if (isDefiningProjection(projection[prop]) && !!projection[prop]) {      if (projection[prop] != null && typeof projection[prop] === 'object') {        return isInclusive(projection[prop]);      } else {        return !!projection[prop];      }    }  }
  return false;};