build/web/c0.js
function validatePropertyKey(name, element, parentType) {
  if (!NUMERIC_PROPERTY_REGEX.test(name)) {
    return;
  }
  warnAndMonitorForKeyUse(
    'Child objects should have non-numeric keys so ordering is preserved.',
    element,
    parentType
  );
}
function validatePropertyKey(name, element, parentType) {
  if (!NUMERIC_PROPERTY_REGEX.test(name)) {
    return;
  }
  warnAndMonitorForKeyUse(
    'Child objects should have non-numeric keys so ordering is preserved.',
    element,
    parentType
  );
}
function validatePropertyKey ( name , element , parentType ) { if ( ! NUMERIC_PROPERTY_REGEX . test ( name ) ) { return ; } warnAndMonitorForKeyUse ( 'Child objects should have non-numeric keys so ordering is preserved.' , element , parentType ) ; }
Warn if the key is being defined as an object property but has an incorrect
value.

@internal
@param {string} name Property name of the key.
@param {ReactElement} element Component that requires a key.
@param {*} parentType element's parent's type.
Warn if the key is being defined as an object property but has an incorrect value .