==== VARIATION: matchExpression=InternalSchemaRootDocEqMatchExpression
$_internalSchemaRootDocEq { a: 1, b: { c: 1 } }

==== VARIATION: taggedMatchExpression=InternalSchemaRootDocEqMatchExpression
$_internalSchemaRootDocEq { a: 1, b: { c: 1 } } || Selected Index #2 pos 0 combine 1

