code: function ( fieldData ) {
              var fieldID    = fieldData.id
                , fieldMeta  = fieldData.meta
                , formValue  = this.props.value
                , fieldValue = getOrNull( fieldData.value, fieldID )
                , fieldErrs  = validate( fieldID, fieldMeta, fieldValue );
  
              this.props.onChange( merge( formValue, fieldData.value ),
                                   fieldData.value, 
                                   fieldErrs );
          }
docs: /* =========================================================== /* ======================== Handlers ========================= /* ===========================================================