function Pointer ($ref, path, friendlyPath) {
/**
 * The {@link $Ref} object that contains this {@link Pointer} object.
 * @type {$Ref}
 */
this.$ref = $ref;

/**
 * The file path or URL, containing the JSON pointer in the hash.
 * This path is relative to the path of the main JSON schema file.
 * @type {string}
 */
this.path = path;

/**
 * The original path or URL, used for error messages.
 * @type {string}
 */
this.originalPath = friendlyPath || path;

/**
 * The value of the JSON pointer.
 * Can be any JSON type, not just objects. Unknown file types are represented as Buffers (byte arrays).
 * @type {?*}
 */
this.value = undefined;

/**
 * Indicates whether the pointer references itself.
 * @type {boolean}
 */
this.circular = false;

/**
 * The number of indirect references that were traversed to resolve the value.
 * Resolving a single pointer may _dereq_ resolving multiple $Refs.
 * @type {number}
 */
this.indirections = 0;
}
This class represents a single JSON pointer and its resolved value.

@param {$Ref} $ref
@param {string} path
@param {string} [friendlyPath] - The original user-specified path (used for error messages)
@constructor