Settings nodes scoping
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Scoping is the operation of navigating a tree by accessing child nodes of via names in a case-insensitive manner. A sequence of names resembling a path in the object structure, such as ["property1", "property2"] is called a scope.
Scoping does not work on and nodes (always results in null).
Scoping is used to map object fields/properties to nodes of settings tree during . It also allows to — create a source that returns a subtree of settings returned by the original source.
{A: 1} scoped to a is just a value of 1.
{A: 1} scoped to b is null.
{A: {B: [1, 2]}} scoped to A is {B: [1, 2]}
{A: {B: [1, 2]}} scoped to [A, B] is [1, 2]
{A: {B: [1, 2]}} scoped to [A, B, C] is null.