Phan\Language\FQSEN\FullyQualifiedFunctionName::fromStringInContext PHP Method

    public static function fromStringInContext(string $fqsen_string, Context $context) : FullyQualifiedFunctionName
    {
        // Check to see if we're fully qualified
        if (0 === strpos($fqsen_string, '\\')) {
            return static::fromFullyQualifiedString($fqsen_string);
        }
        // Split off the alternate ID
        $parts = explode(',', $fqsen_string);
        $fqsen_string = $parts[0];
        $alternate_id = (int) ($parts[1] ?? 0);
        assert(is_int($alternate_id), "Alternate must be an integer");
        $parts = explode('\\', $fqsen_string);
        $name = array_pop($parts);
        assert(!empty($name), "The name cannot be empty");
        // Check for a name map
        if ($context->hasNamespaceMapFor(static::getNamespaceMapType(), $name)) {
            return $context->getNamespaceMapFor(static::getNamespaceMapType(), $name);
        }
        // For functions we don't use the context's namespace if
        // there is no NS on the call.
        $namespace = implode('\\', array_filter($parts));
        return static::make($namespace, $name, $alternate_id);
    }

 public function testFullyQualifiedFunctionName()
 {
     $this->assertFQSENEqual(FullyQualifiedFunctionName::make('\\Name\\Space', 'g'), '\\Name\\Space\\g');
     $this->assertFQSENEqual(FullyQualifiedFunctionName::make('', 'g'), '\\g');
     $this->assertFQSENEqual(FullyQualifiedGlobalConstantName::make('', 'g'), '\\g');
     $this->assertFQSENEqual(FullyQualifiedFunctionName::fromFullyQualifiedString('\\g'), '\\g');
     $this->assertFQSENEqual(FullyQualifiedFunctionName::fromStringInContext('g', $this->context), '\\g');
 }