function isDuplicatedClassNameVariable(variable) {
			const block = variable.scope.block;

			return (
				block.type === "ClassDeclaration" &&
				block.id === variable.identifiers[0]
			);
		}
Checks if a variable of the class name in the class scope of ClassDeclaration.

ClassDeclaration creates two variables of its name into its outer scope and its class scope.
So we should ignore the variable in the class scope.
@param {Object} variable The variable to check.
@returns {boolean} Whether or not the variable of the class name in the class scope of ClassDeclaration.