public function setPhpMetadataNamespace($var)
    {
        GPBUtil::checkString($var, True);
        $this->php_metadata_namespace = $var;
        $this->has_php_metadata_namespace = true;

        return $this;
    }
public function setPhpMetadataNamespace($var)
    {
        GPBUtil::checkString($var, True);
        $this->php_metadata_namespace = $var;
        $this->has_php_metadata_namespace = true;

        return $this;
    }
public function setPhpMetadataNamespace ( $ var ) { GPBUtil :: checkString ( $ var , True ) ; $ this -> php_metadata_namespace = $ var ; $ this -> has_php_metadata_namespace = true ; return $ this ; }
Use this option to change the namespace of php generated metadata classes.
Default is empty. When this option is empty, the proto file name will be used
for determining the namespace.

Generated from protobuf field <code>optional string php_metadata_namespace = 44;</code>
@param string $var
@return $this
Use this option to change the namespace of php generated metadata classes . Default is empty . When this option is empty the proto file name will be used for determining the namespace .