src/main/java/com/passkit/grpc/CommonObjects.java
public Builder putItems(
          java.lang.String key,
          java.lang.String value) {
        if (key == null) { throw new java.lang.NullPointerException(); }
        if (value == null) { throw new java.lang.NullPointerException(); }
        internalGetMutableItems().getMutableMap()
            .put(key, value);
        return this;
      }
/**
       * <pre>
       * Key value pairs. All values must be strings, but formatting and conversion can be defined in the pass template. Keys should be alphanumeric, start with a lowercase level and use camel case.  They can be accessed in the pass template by prefixing with 'meta.'. E.g. 'meta.myCustomKey'.
       * </pre>
       *
       * <code>map&lt;string, string&gt; items = 1;</code>
       */

Key value pairs. All values must be strings, but formatting and conversion can be defined in the pass template. Keys should be alphanumeric, start with a lowercase level and use camel case.  They can be accessed in the pass template by prefixing with 'meta.'.

map<string, string> items = 1.
Key value pairs . All values must be strings but formatting and conversion can be defined in the pass template . Keys should be alphanumeric start with a lowercase level and use camel case . They can be accessed in the pass template by prefixing with ' meta . ' . map<string string > items = 1 .
public Builder putItems(
          java.lang.String key,
          java.lang.String value) {
        if (key == null) { throw new java.lang.NullPointerException(); }
        if (value == null) { throw new java.lang.NullPointerException(); }
        internalGetMutableItems().getMutableMap()
            .put(key, value);
        return this;
      }
public Builder putItems ( java . lang . String key , java . lang . String value ) { if ( key == null ) { throw new java . lang . NullPointerException ( ) ; } if ( value == null ) { throw new java . lang . NullPointerException ( ) ; } internalGetMutableItems ( ) . getMutableMap ( ) . put ( key , value ) ; return this ; }
<pre>
 Key value pairs.
<pre > Key value pairs .