function canFix(node){var variables=context.getDeclaredVariables(node);var scopeNode=getScopeNode(node);if(node.parent.type==="SwitchCase"||node.declarations.some(hasSelfReferenceInTDZ)||variables.some(isRedeclared)||variables.some(isUsedFromOutsideOf(scopeNode))){return false;}if(astUtils.isInLoop(node)){if(variables.some(isReferencedInClosure)){return false;}if(!isLoopAssignee(node)&&!isDeclarationInitialized(node)){return false;}}if(!isLoopAssignee(node)&&!(node.parent.type==="ForStatement"&&node.parent.init===node)&&!astUtils.STATEMENT_LIST_PARENTS.has(node.parent.type)){// If the declaration is not in a block, e.g. `if (foo) var bar = 1;`, then it can't be fixed.
return false;}return true;}
Checks whether it can fix a given variable declaration or not.
It cannot fix if the following cases:

- A variable is declared on a SwitchCase node.
- A variable is redeclared.
- A variable is used from outside the scope.
- A variable is used from a closure within a loop.
- A variable might be used before it is assigned within a loop.
- A variable might be used in TDZ.
- A variable is declared in statement position (e.g. a single-line `IfStatement`)

## A variable is declared on a SwitchCase node.

If this rule modifies 'var' declarations on a SwitchCase node, it
would generate the warnings of 'no-case-declarations' rule. And the
'eslint:recommended' preset includes 'no-case-declarations' rule, so
this rule doesn't modify those declarations.

## A variable is redeclared.

The language spec disallows redeclarations of `let` declarations.
Those variables would cause syntax errors.

## A variable is used from outside the scope.

The language spec disallows accesses from outside of the scope for
`let` declarations. Those variables would cause reference errors.

## A variable is used from a closure within a loop.

A `var` declaration within a loop shares the same variable instance
across all loop iterations, while a `let` declaration creates a new
instance for each iteration. This means if a variable in a loop is
referenced by any closure, changing it from `var` to `let` would
change the behavior in a way that is generally unsafe.

## A variable might be used before it is assigned within a loop.

Within a loop, a `let` declaration without an initializer will be
initialized to null, while a `var` declaration will retain its value
from the previous iteration, so it is only safe to change `var` to
`let` if we can statically determine that the variable is always
assigned a value before its first access in the loop body. To keep
the implementation simple, we only convert `var` to `let` within
loops when the variable is a loop assignee or the declaration has an
initializer.

@param {ASTNode} node - A variable declaration node to check.
@returns {boolean} `true` if it can fix the node.