Returns true if this metadata contains one or more values for the specified key.
Return
true if this metadata contains the key, false otherwise
Parameters
the key whose presence is to be tested (case-insensitive). Must contain only digits (0-9), lowercase letters (a-z), and special characters (-, _, .).
Returns true if this metadata contains one or more values for the specified key.
Return
true if this metadata contains the key, false otherwise
Parameters
the key whose presence is to be tested (case-insensitive). Must contain only digits (0-9), lowercase letters (a-z), and special characters (-, _, .).
Returns true if this metadata contains one or more values for the specified key.
Return
true if this metadata contains the key, false otherwise
Parameters
the key whose presence is to be tested (case-insensitive). Must contain only digits (0-9), lowercase letters (a-z), and special characters (-, _, .).