==== VARIATION: bonsai + sbe, {$match: {a: 1}}, {}
fGVxAGE/AAAAAAoAAAAx
==== VARIATION: bonsai + sbe, {$match: {a: 2}}, {}
fGVxAGE/AAAAAAoAAAAx
==== VARIATION: bonsai + sbe, {$match: {b: 1}}, {}
fGVxAGI/AAAAAAoAAAAx
==== VARIATION: bonsai + sbe, {$match: {$and: [{a: 1}, {b: 1}]}}, {}
fGFuAFtlcQBhPwAAAAAKAAAALGVxAGI/AQAAAAoAAABdMQ==
==== VARIATION: bonsai + sbe, {$match: {$or: [{a: 1}, {b: 1}]}}, {}
fG9yAFtlcQBhPwAAAAAKAAAALGVxAGI/AQAAAAoAAABdMQ==
==== VARIATION: bonsai + sbe, {$match: {a: 1}}, {$project: {a: 1}}
fGVxAGE/AAAAAAoAAAB8HgAAAAMkcHJvamVjdAAPAAAACF9pZAABCGEAAQAAMQ==
==== VARIATION: bonsai + sbe, {$match: {b: 1}}, {$project: {b: 1}}
fGVxAGI/AAAAAAoAAAB8HgAAAAMkcHJvamVjdAAPAAAACF9pZAABCGIAAQAAMQ==
==== VARIATION: bonsai + sbe, {$match: {$and: [{a: 1}, {b: 1}]}}, {$project: {a: 1, b: 1}}
fGFuAFtlcQBhPwAAAAAKAAAALGVxAGI/AQAAAAoAAABdfCIAAAADJHByb2plY3QAEwAAAAhfaWQAAQhhAAEIYgABAAAx
==== VARIATION: bonsai + sbe, {$match: {$or: [{a: 1}, {b: 1}]}}, {$project: {a: 1, b: 1}}
fG9yAFtlcQBhPwAAAAAKAAAALGVxAGI/AQAAAAoAAABdfCIAAAADJHByb2plY3QAEwAAAAhfaWQAAQhhAAEIYgABAAAx
